trane xl824 thermostat

If you already own a Trane XL824 thermostat, congratulations! You have chosen one of the most cutting-edge methods for controlling your home’s heating and cooling systems that’s available today.

If you do not own a Trane XL824 thermostat, stay right where you are, and let’s go over all the ways that this smart thermostat can make your life easier! 

First, the Trane XL824 thermostat removes just about every barrier to controlling your heating and cooling equipment. In the past, heating and cooling was controlled by a small mercury-switch thermostat on the wall. If you wanted to save money by turning the heat down when you left for work, you had to remember to turn the dial on the wall. With all the things we have to remember to do each morning, remembering to turn down the heat is the last thing on our minds!  

We’ve listed all the key advantages of the Trane XL824 in this infographic:

Now, let’s delve deeper into the features of the Trane XL824 thermostat and explore how you can make full use of those features.

What’s the difference between Nest thermostat and the Trane XL824 thermostat?  

That is a great question to ask. The advantage of the Nest thermostat is its learning capabilities.  The Nest thermostat is much more predictive and does more to learn activity and behaviors inside the home so it can over time set the most ideal schedules and temperatures.  It is constantly monitoring and updating itself adjusting itself to each family’s individual needs.  However, the Nest is not compatible with Nexia and its peripheral devices.  So the nest cannot act as an automation hub like the XL824.  In short, the Trane XL824 gives you all the control overheating, cooling, and many other things, while the Nest can help control your heating and cooling by itself without any outside intervention.

The Trane XL824 thermostat is among the most advanced heating and cooling controls available, but many of its uses can easily be overlooked!  Here’s a step-by-step guide to unlocking its incredible potential.

Setting Your Energy (Money) Saving Schedule

The Trane XL824 makes it easy to save energy and money by scheduling your system to change temperature when no one is in the house, or when everyone is sleeping. To set the schedule, you can add or remove set periods for the system to change temperature regularly based on the time of day.  To add or remove a period, press “Menu”>”Schedules”>”Add Period.” Then you can add a period and name it. As seen below.

First, hit the Menu button.

Now, press Schedules.

Then, add a Period

Next, select where in the day you would like to add the period.

Now, name your period.

To delete a period, do steps 1-3, only this time pressing “Delete Period” instead of “Add Period.”

If your Schedule is less predictable, you also have the option of setting up one-touch presets.  With these, you can start or stop certain periods at any time of the day, making the schedule much more flexible.  Of course, you can still set and hold the desired temperature indefinitely as well.

To set up a One-Touch Preset, schedules must first be disabled.

Simply hop into your schedule settings and hit “disable.”

Now, you can change your One-Touch presets to suit your needs.

Changing Your Color Scheme

Many of the touch-screen thermostats available today usually come standard with just one boring color scheme for the background around the buttons. Not so with the XL824!  This thermostat gives you a range of backgrounds to choose from to suit your needs.

To change your background color:

Go to Settings, then press “Display”

Now, select the Color Themes tab and select the color you like best from the menu.  

Then, press Apply.

Setting System Maintenance and Service Reminders

Ever wait so long to change your filter that it caused the system to turn off?  How about the time it went down because of a lack of maintenance?

PRO TIP: You can set automatic reminders on your XL824 to make sure you never go too long between changing your filters or having your system inspected for safety.

To set a reminder:

Go to Settings, then press “Reminders.”

 

To adjust your air filter reminder, select “Air Filter” and then you can adjust the reminder based on run time, or calendar days.

Getting Online

One of the things that make the XL824 so powerful is its ability to connect to the internet.  By connecting to the internet, the XL824 can display local weather and the temperature outside.  It even allows you to access your thermostat from anywhere in the world, using Nexia Home Intelligence.

Connecting to Nexia

Purchasing a Trane XL824 thermostat automatically gives you a subscription to Nexia Home Intelligence.  Nexia gives you the ability to control many of your home’s devices using a smartphone, tablet, or web browser. It can help you automate anything from light bulbs and door locks, to water-main valves and security cameras.

Integrating your thermostat with other Nexia Devices

You can also use your Trane XL824 thermostat not only as a thermostat, but also as a hub for other Nexia devices in the home.  Normally, most Nexia devices require a device called a Z-wave bridge to let them connect to the internet.  However, with the XL824, it can double as a Z-wave bridge and repeater allowing you to easily expand your home intelligence network beyond heating and cooling.

Auto Changeover

With such an advanced thermostat, why not let it change between heating and cooling systems automatically?  The Trane XL824 thermostat can automatically switch from heating to cooling and back again when the weather is unpredictable.

Keeping Your Software Up To Date

Because your thermostat is connected to the web, its software is updated to keep it working at its best.  Make sure to always check and make sure your software is up to date.

Other Cool Tricks

  • Zoning — The Trane XL824 works very well as a zoning thermostat. Many modern homes are now being set up with a zoning system that allows for more balanced comfort within the home.  Zoning can help a lot when one side (or level) of the house is always a different temperature, and usually uncomfortable- even when the heating and cooling equipment is running.  Imagine walking into your house, and instead of having a light switch for each room, all you have is one switch that turns every light in the house on or off, all at the same time!  Not very practical, is it?  This is exactly what happens when we adjust the thermostat on our walls. Zoning gives you the ability to choose where you want the air to go, and when you need it.
    • Automation in Nexia — Nexia also has the ability to automate many tasks.  Just because you can now turn your heater up or down from your office, doesn’t mean that you would WANT to do that!  You can use Nexia to automate schedules and tasks so you don’t have to constantly worry about how warm the house is going to be when you get home from work.  Also, using Nexia’s integration with other devices, you can automate much more than just when the heater turns on and off!  Anything from door locks to security cameras can all now be automated from just one place.
    • Vacations — With the Trane XL 824 thermostat, paired with Nexia, it’s easy to set it up to automatically heat or cool your home while you are away on vacation.
    • Door Locks — Door locks don’t have to just be opened by keys, now you can use your Nexia account to lock and unlock doors.  No more carrying bulky key rings around and losing your last set of spares!
  • Outlets — Nexia can be used to control and automate even electrical outlets, so anything you plug into an outlet can now be automated by your Nexia account.  The sky really is the limit with being able to control outlets!
  • Cameras — You can monitor your house from anywhere you have a smartphone or desktop with Nexia Home Intelligence.  Nexia is offering cameras with the ability to sync up with the rest of your home so you can assure complete peace of mind for your home, even when you are not able to be there physically.

Ready To Get Started? We Can Help!

These are a few good places to get started with your Trane XL 824 Thermostat.  The best thing to do is use it and discover just how much it can do for you!

For more than 40 years, Access Heating & Air Conditioning has been on the cutting edge of providing the best level of comfort, peace of mind, and ease of use for heating and cooling equipment here in the Treasure Valley. Give us a call today if you would like further information in setting up your smart home for the Trane XL824 smart thermostat!

Download the Trane 824 Thermostat below:

XL824 User Manual

164 Comments

  1. My Trane XL824 thermostat is showing 3 degrees warmer than it actually is in the room. Is there a way to adjust it to the correct temperature?

  2. My Trane XL824 thermostat is showing 3 degrees warmer than it actually is in the room. Is there a way to adjust it to the correct temperature?

  3. My Trane XL824 thermostat is showing 3 degrees warmer than it actually is in the room. Is there a way to adjust it to the correct temperature?

  4. Can you make a humidor run automatic (changes humidity with outside temperature) from using the Internet weather when it’s connected wireless with the xl824? Or do you have to have the outside temperature probe connected?

  5. Can you make a humidor run automatic (changes humidity with outside temperature) from using the Internet weather when it’s connected wireless with the xl824? Or do you have to have the outside temperature probe connected?

    • Hi Nick,
      Yes- an outdoor temperature probe/senser is the way to run automatic changes for any humidity controls.

    • Thank you for the quick reply. Is that the better way to go (automatic)? What are the pro and cons of this.

    • An outdoor temperature sensor allows better use of the thermostat and more features/more control… The disadvantage to the outdoor sensor would be the installation cost, but once it’s in, you’re done

    • And it also depends what sort of heat you have (electric, gas/propane, water, etc.) and how the humidifier is wired. Wiring them to turn the fan on or to turn on only if the heat cycle turns on

    • I have natural gas heater and the humidifier only runs when it calls for heat. I have a zoned system with the humidity controlled from the xl824 on the main floor.

    • I have been searching high and low to see which sensor (brand, kind) that will work with this. So I have been hesitant to pull the trigger on buying a sensor (I like to do a lot of research first). Do you have any recommendation on a sensor to use?

  6. Can you make a humidor run automatic (changes humidity with outside temperature) from using the Internet weather when it’s connected wireless with the xl824? Or do you have to have the outside temperature probe connected?

    • Hi Nick,
      Yes- an outdoor temperature probe/senser is the way to run automatic changes for any humidity controls.

    • Thank you for the quick reply. Is that the better way to go (automatic)? What are the pro and cons of this.

    • An outdoor temperature sensor allows better use of the thermostat and more features/more control… The disadvantage to the outdoor sensor would be the installation cost, but once it’s in, you’re done

    • And it also depends what sort of heat you have (electric, gas/propane, water, etc.) and how the humidifier is wired. Wiring them to turn the fan on or to turn on only if the heat cycle turns on

    • I have natural gas heater and the humidifier only runs when it calls for heat. I have a zoned system with the humidity controlled from the xl824 on the main floor.

    • I have been searching high and low to see which sensor (brand, kind) that will work with this. So I have been hesitant to pull the trigger on buying a sensor (I like to do a lot of research first). Do you have any recommendation on a sensor to use?

  7. Can you tell me how to change the indoor temp settings for the xl824, it’s a 2stage electric heat pump?. I’ve checked the manual but haven’t been able to find it. I was told I could change the settings and allow 1 stage heat to come on and at a selected indoor temp have the 2nd stage heat kick in.
    Thank you

    • Hi Kory,
      Click into settings>service>proceed (hold down for 8 seconds to access next screen), a caution will pop up wanting to make sure you proceed with caution>system settings

      Who installed the thermostat?

  8. Can you tell me how to change the indoor temp settings for the xl824, it’s a 2stage electric heat pump?. I’ve checked the manual but haven’t been able to find it. I was told I could change the settings and allow 1 stage heat to come on and at a selected indoor temp have the 2nd stage heat kick in.
    Thank you

    • Hi Kory,
      Click into settings>service>proceed (hold down for 8 seconds to access next screen), a caution will pop up wanting to make sure you proceed with caution>system settings

      Who installed the thermostat?

  9. Hi, I have the xl824 thermostat and a little Red Cross randomly appears when the system is heating and no one seems to know what it means, anyone here know? If so can you tell me what manual you found it in? Thx

    • The manual says that it is getting both a demand for heat and a demand for cooling at the same time. Not sure if it means anything else or not Hopefully you figured it out since then.

    • Hmm. Not sure why there would be a cross?? We have never seen this happen before. Not sure if it is a problem or just a normal operation with the version of software you’re running- which version are you on?

    • Aux heat is on. The “plus” appears just left of the “heat” icon when heating. This is normal when really cold out or when the unit is defrosting. Otherwise it would be blowing super-cold (colder than outside) air into your house.

    • Where did you find your info as there is nothing in the manual showing this and also it appears in the summer months. Typically when the six heat comes on I get an icon at the bottom which shows “eheat” (emergency heat)
      Thx

      Sent from Stevens IPhone

  10. Hi, I have the xl824 thermostat and a little Red Cross randomly appears when the system is heating and no one seems to know what it means, anyone here know? If so can you tell me what manual you found it in? Thx

    • Hi Steven,
      Not sure what that cross is about :/ if we see something we will let you know!

    • The manual says that it is getting both a demand for heat and a demand for cooling at the same time. Not sure if it means anything else or not Hopefully you figured it out since then.

    • Hmm. Not sure why there would be a cross?? We have never seen this happen before. Not sure if it is a problem or just a normal operation with the version of software you’re running- which version are you on?

    • Aux heat is on. The “plus” appears just left of the “heat” icon when heating. This is normal when really cold out or when the unit is defrosting. Otherwise it would be blowing super-cold (colder than outside) air into your house.

    • Where did you find your info as there is nothing in the manual showing this and also it appears in the summer months. Typically when the six heat comes on I get an icon at the bottom which shows “eheat” (emergency heat)
      Thx

      Sent from Stevens IPhone

  11. Hello, my new XL824 needs to be calibrated. The touch screen points are way off making it challenging to get things done. I read that it can be done with factory settings, but it seems that option has been removed by the installer, which I am not sure who installed. Is there a way to calibrate the unit, reboot, or find the factory setting button?

    • Hi Mike!
      You will want to carefully remove the thermostat from the wall- give it a good tug- and when you reinstall it on the baseplate, the thermostat will reboot. There is an option to calibrate the screen at that point.
      Let us know how it turns out.

    • Thank you this worked perfectly! Well except that I pulled the entire base out of the wall as well! ha. Looks like it was not securely mounted to the wall, but I can fix that part. Thanks again for your help, it was very easy to fix after the reboot.

    • Good thing you can fix that! And glad it worked!
      If you have a few moments can you leave us a review on our Facebook or G+ page? Really helps us out!

  12. Hello, my new XL824 needs to be calibrated. The touch screen points are way off making it challenging to get things done. I read that it can be done with factory settings, but it seems that option has been removed by the installer, which I am not sure who installed. Is there a way to calibrate the unit, reboot, or find the factory setting button?

    • Hi Mike!
      You will want to carefully remove the thermostat from the wall- give it a good tug- and when you reinstall it on the baseplate, the thermostat will reboot. There is an option to calibrate the screen at that point.
      Let us know how it turns out.

    • Thank you this worked perfectly! Well except that I pulled the entire base out of the wall as well! ha. Looks like it was not securely mounted to the wall, but I can fix that part. Thanks again for your help, it was very easy to fix after the reboot.

    • Good thing you can fix that! And glad it worked!
      If you have a few moments can you leave us a review on our Facebook or G+ page? Really helps us out!

  13. Timely analysis . I was enlightened by the specifics – Does someone know if my assistant would be able to get a template a form form to work with ?

  14. Timely analysis . I was enlightened by the specifics – Does someone know if my assistant would be able to get a template a form form to work with ?

  15. Thank you for perhaps the most level headed thing I have read today. I also can be helpful here 🙂 Maybe you would be interested in an online service with a ton of Form templates (tax, real estate, legal, business, insurance forms, etc..) I used it to fill out http://goo.gl/Hna2N0

  16. Timely analysis . I was enlightened by the specifics – Does someone know if my assistant would be able to get a template a form form to work with ?

  17. Thank you for perhaps the most level headed thing I have read today. I also can be helpful here 🙂 Maybe you would be interested in an online service with a ton of Form templates (tax, real estate, legal, business, insurance forms, etc..) I used it to fill out http://goo.gl/Hna2N0

  18. We just got a new Trane and XL824 Thermostat; very confusing very hard to understand how do i turn the AC off; It’s cool enough tonight not to use AC. They should offer a video how to work it.

    • Hi Rob,
      It can be pretty difficult to navigate for the first month but once you use it for awhile you’ll get the hang of it.
      If you go to the system mode at the bottom, next to “menu” it will pull up the option for off.

  19. We just got a new Trane and XL824 Thermostat; very confusing very hard to understand how do i turn the AC off; It’s cool enough tonight not to use AC. They should offer a video how to work it.

    • Hi Rob,
      It can be pretty difficult to navigate for the first month but once you use it for awhile you’ll get the hang of it.
      If you go to the system mode at the bottom, next to “menu” it will pull up the option for off.

  20. If the power were to go out (due to weather) we would turn off the old thermostat and then later turn it on after the power came back on in case of a surge; With this thermo, is there a battery back up to turn it off? What should we do?

    • This thermostat does not have a battery back up. If power is lost to the system, there is a 5 minute restore delay in order to protect the compressor outside.
      Hope this helps!

    • Throw the breaker. When power is being restored, there frequently is a bit of up and down. Power’s on, then off, then back on a few minutes later. Tough on all digital and compressor equipment. Just wait until it’s been on for a half hour or longer if you want to be cautious.

  21. If the power were to go out (due to weather) we would turn off the old thermostat and then later turn it on after the power came back on in case of a surge; With this thermo, is there a battery back up to turn it off? What should we do?

    • This thermostat does not have a battery back up. If power is lost to the system, there is a 5 minute restore delay in order to protect the compressor outside.
      Hope this helps!

    • Throw the breaker. When power is being restored, there frequently is a bit of up and down. Power’s on, then off, then back on a few minutes later. Tough on all digital and compressor equipment. Just wait until it’s been on for a half hour or longer if you want to be cautious.

  22. We just got the XL824 thermastat and I notice the screen never turns off. I set the screensaver to black screen. But I can tell it’s just coloring the screen black, the display is still on. Is there anyway to have the display turn off?

    Thanks
    Joe

    • Hi Joe,
      Great question! The thermostat needs constant power to the screen to accept commands at any given point so unfortunately it always needs to be on. Is there a reason you need it to be completely back? Like for sleeping purposes?

    • I’m just concerned that the screen will burn out over time. Perhaps new models will let the screen turn-off.. And can be woke up by pressing a button near the screen. Similar to an iPhone home button.

      Thanks
      Joe

  23. We just got the XL824 thermastat and I notice the screen never turns off. I set the screensaver to black screen. But I can tell it’s just coloring the screen black, the display is still on. Is there anyway to have the display turn off?

    Thanks
    Joe

    • Hi Joe,
      Great question! The thermostat needs constant power to the screen to accept commands at any given point so unfortunately it always needs to be on. Is there a reason you need it to be completely back? Like for sleeping purposes?

    • I’m just concerned that the screen will burn out over time. Perhaps new models will let the screen turn-off.. And can be woke up by pressing a button near the screen. Similar to an iPhone home button.

      Thanks
      Joe

  24. I just had 2 new Trane heat pump systems installed 4 days ago with 2 XL824 thermostats, and they worked perfectly for the first 3 days. I was able to change settings from my laptop or my smart phone. Then last night I totally lost the ability to make any changes on either thermostat! It allows me to change the temperature setting, but then 5 seconds later it jumps back to the original setting. Not sure what to do. Really disappointing!

    • Hi Bill,
      Sounds disappointing! Do you know if the installing company registered your thermostat online on their end?

    • They installed 2 XR15’s, 2 TEM6 air handlers, and 2 XL824 thermostats on Wednesday and told me they’d take care of registering everything with Trane. Since I am unable to remotely control BOTH thermostats now, and it happened at the same time 3 days after both had worked fine, my guess is this is a NEXIA problem? Just a hunch. I’m going to call them.
      Just ticks me off because I have a carrier Infinity system installed in my condo in Michigan for a few months now, and I’ve never had a problem with it. Makes me wish I had gone with Carrier for my Florida condo.

    • Don’t jump ship just yet! Trane is a far superior product across our decades of experience.
      Contact Nexia and see if they have any record of servers dropping offline or anything weird like that. (877) 288-7707
      And keep us posted! I bet your installing company can take care of this.

    • Yep, I called Nexia Customer Service as soon as they opened this morning. They just called me back to report that they had a server problem since last night, and it’s now been repaired. Just checked both thermostats and they’re responding remotely again! Thanks much for your assistance and advice.

  25. I just had 2 new Trane heat pump systems installed 4 days ago with 2 XL824 thermostats, and they worked perfectly for the first 3 days. I was able to change settings from my laptop or my smart phone. Then last night I totally lost the ability to make any changes on either thermostat! It allows me to change the temperature setting, but then 5 seconds later it jumps back to the original setting. Not sure what to do. Really disappointing!

    • Hi Bill,
      Sounds disappointing! Do you know if the installing company registered your thermostat online on their end?

    • They installed 2 XR15’s, 2 TEM6 air handlers, and 2 XL824 thermostats on Wednesday and told me they’d take care of registering everything with Trane. Since I am unable to remotely control BOTH thermostats now, and it happened at the same time 3 days after both had worked fine, my guess is this is a NEXIA problem? Just a hunch. I’m going to call them.
      Just ticks me off because I have a carrier Infinity system installed in my condo in Michigan for a few months now, and I’ve never had a problem with it. Makes me wish I had gone with Carrier for my Florida condo.

    • Don’t jump ship just yet! Trane is a far superior product across our decades of experience.
      Contact Nexia and see if they have any record of servers dropping offline or anything weird like that. (877) 288-7707
      And keep us posted! I bet your installing company can take care of this.

    • Yep, I called Nexia Customer Service as soon as they opened this morning. They just called me back to report that they had a server problem since last night, and it’s now been repaired. Just checked both thermostats and they’re responding remotely again! Thanks much for your assistance and advice.

    • Oh awesome! Good to hear. Good luck with your new system. Think you’ll enjoy the set up you got.

  26. Thanks for your informational web site.

    I would like to connect a wired remote temperature sensor to
    my XL824. This is for indoor temperature, not the outdoor temperatures.

    Can you recommend a remote temperature sensor that will work with the XL824?

  27. Thanks for your informational web site.

    I would like to connect a wired remote temperature sensor to
    my XL824. This is for indoor temperature, not the outdoor temperatures.

    Can you recommend a remote temperature sensor that will work with the XL824?

    • Robert! We haven’t been able to find a remote sensor that we can recommend; good luck!

  28. Hello getting the new trane S9v2 and a xr16 the dealer prefers to install a xl850 with only three wires and a relay panel. I told him I think XL824 would be better choice since it is a 24v system and needs to run five or six wire new connection. What is the right stat please help…

    • Hi Bobby,
      Either one is fine. I’d recommend leaving it up to the dealer to make that call.
      Sometimes running additional wires isn’t feasible or the benefits are to small to warrant additional costs. Both thermostats will work great with this particular system you mentioned.

  29. Hello getting the new trane S9v2 and a xr16 the dealer prefers to install a xl850 with only three wires and a relay panel. I told him I think XL824 would be better choice since it is a 24v system and needs to run five or six wire new connection. What is the right stat please help…

    • Hi Bobby,
      Either one is fine. I’d recommend leaving it up to the dealer to make that call.
      Sometimes running additional wires isn’t feasible or the benefits are to small to warrant additional costs. Both thermostats will work great with this particular system you mentioned.

  30. I just purchased a new home and have the Trane XL824 on my first floor and a standard thermostat on the second floor. We had a one story home before and had a Nest (2nd gen) and were spoiled by that. I really liked that I could set the parameters of my thermostat and then walk away. I am having a hard time figuring out the XL824; I have set three automations to control the A/C for the first floor, but the second floor is more manual. Do you have any suggestions for a beginner working with this thermostat? I my biggest goal is to save money now that my heating/cooling bill will go up and I do not want my A/C running all day because an automation will not shut off, the Nest was good to learn my habits.

    • Hi John! The nest is certainly more user-friendly but once you figure out the train thermostat it should be a breeze . You can set the thermostat to run on “auto” instead of heat or cool only. Congrats on your new home by the way 🙂

  31. I just purchased a new home and have the Trane XL824 on my first floor and a standard thermostat on the second floor. We had a one story home before and had a Nest (2nd gen) and were spoiled by that. I really liked that I could set the parameters of my thermostat and then walk away. I am having a hard time figuring out the XL824; I have set three automations to control the A/C for the first floor, but the second floor is more manual. Do you have any suggestions for a beginner working with this thermostat? I my biggest goal is to save money now that my heating/cooling bill will go up and I do not want my A/C running all day because an automation will not shut off, the Nest was good to learn my habits.

    • Hi John! The nest is certainly more user-friendly but once you figure out the train thermostat it should be a breeze . You can set the thermostat to run on “auto” instead of heat or cool only. Congrats on your new home by the way 🙂

  32. My in laws just had a new HVAC system put in that came with this thermostat. They have it set on permanent hold and have noticed that the thermostat has switched itself to “run schedule” twice on its own. Why is it doing this?

    • Hi Charise!
      It seems as if the thermostat is having a mind of its own! Consider replacing it, should be under a warranty with the company that installed the equipment for you.

  33. My in laws just had a new HVAC system put in that came with this thermostat. They have it set on permanent hold and have noticed that the thermostat has switched itself to “run schedule” twice on its own. Why is it doing this?

    • Hi Charise!
      It seems as if the thermostat is having a mind of its own! Consider replacing it, should be under a warranty with the company that installed the equipment for you.

  34. I had my new WiFi Trane thermostat installed yesterday and the indoor temperature was about 5 degrees higher than my mercury thermometer. Because I found this site and read the questions, I was able to go into settings and recalibrate the offset. Thanks! Now I have to wait on my AC guy to tell him I fixed it when he arrives lol!

    • Oh good to hear! By the way, mercury thermostats can be tend to run a little off; consider a digital style for better accuracy…

  35. I had my new WiFi Trane thermostat installed yesterday and the indoor temperature was about 5 degrees higher than my mercury thermometer. Because I found this site and read the questions, I was able to go into settings and recalibrate the offset. Thanks! Now I have to wait on my AC guy to tell him I fixed it when he arrives lol!

    • Oh good to hear! By the way, mercury thermostats can be tend to run a little off; consider a digital style for better accuracy…

  36. Hello I have just had a Trane XR16 heat pump installed that takes care of both my heating and cooling needs. It came with the Trane XL824 Smart Control. I have figured out the scheduling process but have a question regarding the temperature range I should use. So during the day we have the system set to maintain 70 degrees. Then at night I have it set to 65. So at 5:30 AM it changes to the daytime setting of 70 degrees. I have noticed that this is causing the aux heat to be activated. Indicated by the red plus sign next to the heat ways animation. My question is am I using more energy by heating from 65 to 70 in the morning then if I would just stay with in the 2 degree parameter and set the night time temp to 68? Thanks

    • Brian, the short answer about energy use is YES. The resistance coils (think overgrown hair dryer coils) that make up most aux heat systems are simply electric heat elements. This is far less efficient to generate heat than the same amount of Watts used to run a heat pump system when things are working properly.

      I don’t heat by heat pump with my Trane XR/Nexia xl824 (I have a nat gas furnace). I would be surprised that the Nexia wouldn’t have a ‘recovery’ setting for ramping up to a set point as you’ve described. The other zone in my home is heated by a Trane heat pump, using an older honeywell 5-1-1 thermostat. Like you, we keep it very cool overnight, and reasonable temps (68) during the day. When the day cycle kicks in, the honeywell shows a ‘recovery’ notice, and the heat pump gradually makes its way up from 62 to 68. Runs about 20 minutes on and off to do this, without the aux kicking in unless it’s brutally cold out (like, freezing). Why a ‘smart’ thermostat wouldn’t do the same seems — very odd. If these folks can’t answer your question, kick it up to Trane/Nexia.

      BTW, I do see aux kick in when it’s very cold. That would be expected — heat pumps are as efficient below about 40F. They tend to ice up, and spend a lot of energy deicing themselves. I would tell you first to spend some time reviewing how well insulated your home is so you don’t lose heat unnecessarily, then consider your options for a thermostat that can glide up in heat between set points, rather than goosing it as you describe if Nexia doesn’t have an answer.

    • Absolutely, but note I wrote: “are as efficient below about 40F” when I meant “aren’t as efficient below about 40F”

    • Paul thank you for your reply. I will look into this. Does anyone else reading this know if the xl824 has the “glide” feature mentioned by Paul in this response?

    • The heat pump not efficient below 40 degrees is really, really old info. Like over 25 years. New heat pumps work well without aux heat down into the teens and are vastly more efficient than resistance heat. Like 250 percent. Obviously they transfer more heat fast the higher the outside temp, but my XL18i works on just compressor down to near 10 deg F (with no wind—much depends on your home heat loss).

    • @mikem132:disqus Alot of the efficiency from our heat pumps is not based on temperature alone but other factors like you mentioned- wind. Also, outdoor humidity will play a great role in how low our heat pumps can run. Some areas closer to the coast can have their heat pumps operate to lower temperatures during the winter.
      Good observation though and thanks for adding your insight.

  37. Hello I have just had a Trane XR16 heat pump installed that takes care of both my heating and cooling needs. It came with the Trane XL824 Smart Control. I have figured out the scheduling process but have a question regarding the temperature range I should use. So during the day we have the system set to maintain 70 degrees. Then at night I have it set to 65. So at 5:30 AM it changes to the daytime setting of 70 degrees. I have noticed that this is causing the aux heat to be activated. Indicated by the red plus sign next to the heat ways animation. My question is am I using more energy by heating from 65 to 70 in the morning then if I would just stay with in the 2 degree parameter and set the night time temp to 68? Thanks

    • Brian, the short answer about energy use is YES. The resistance coils (think overgrown hair dryer coils) that make up most aux heat systems are simply electric heat elements. This is far less efficient to generate heat than the same amount of Watts used to run a heat pump system when things are working properly.

      I don’t heat by heat pump with my Trane XR/Nexia xl824 (I have a nat gas furnace). I would be surprised that the Nexia wouldn’t have a ‘recovery’ setting for ramping up to a set point as you’ve described. The other zone in my home is heated by a Trane heat pump, using an older honeywell 5-1-1 thermostat. Like you, we keep it very cool overnight, and reasonable temps (68) during the day. When the day cycle kicks in, the honeywell shows a ‘recovery’ notice, and the heat pump gradually makes its way up from 62 to 68. Runs about 20 minutes on and off to do this, without the aux kicking in unless it’s brutally cold out (like, freezing). Why a ‘smart’ thermostat wouldn’t do the same seems — very odd. If these folks can’t answer your question, kick it up to Trane/Nexia.

      BTW, I do see aux kick in when it’s very cold. That would be expected — heat pumps are as efficient below about 40F. They tend to ice up, and spend a lot of energy deicing themselves. I would tell you first to spend some time reviewing how well insulated your home is so you don’t lose heat unnecessarily, then consider your options for a thermostat that can glide up in heat between set points, rather than goosing it as you describe if Nexia doesn’t have an answer.

    • Absolutely, but note I wrote: “are as efficient below about 40F” when I meant “aren’t as efficient below about 40F”

    • Paul thank you for your reply. I will look into this. Does anyone else reading this know if the xl824 has the “glide” feature mentioned by Paul in this response?

    • The heat pump not efficient below 40 degrees is really, really old info. Like over 25 years. New heat pumps work well without aux heat down into the teens and are vastly more efficient than resistance heat. Like 250 percent. Obviously they transfer more heat fast the higher the outside temp, but my XL18i works on just compressor down to near 10 deg F (with no wind—much depends on your home heat loss).

    • @mikem132:disqus Alot of the efficiency from our heat pumps is not based on temperature alone but other factors like you mentioned- wind. Also, outdoor humidity will play a great role in how low our heat pumps can run. Some areas closer to the coast can have their heat pumps operate to lower temperatures during the winter.
      Good observation though and thanks for adding your insight.

  38. Folks,

    I wanted to add a few items to this discussion, as I’ve found precious little info online that addresses issues and fixes I’ve experienced with my Nexia xl824 and Trane furnace/AC system.

    Troubleshooting: If no power to Nexia XL824 thermostat (blank screen, unresponsive), check GFI receptacle on furnace branch circuit for reset, then check breaker for furnace, then check the condensate pump (if one is in use). Note for systems that have condensate pumps that there may be up to three safety floats on the power line from air handler controller board to the pump: one near the trap toward the evaporator housing, a drain pan float and/or the pump alarm float, in order of the 24V AC current flow. If any one of those are tripped (open), that wire is the power (commonly Red) feed for the thermostat. Main board on air handler will blink 21 green, one red in normal state. The evaporator pan drain lines may have clogged with gunk, or the drain pump seized and failed. No power to the thermostat is normally a safety cutoff such as described above. Rectify that part of the problem and the thermostat will get power, reboot and be operational in 2-5 minutes. Be patient with the Nexia reboot process, as it can take a while.

    If the Nexia XL824 continues to reboot (software loading/initializing, Trane splash screen displays, goes all white and repeats), the controller board in the air handler has an issue or alert. One item to check is the condensate pump and its drain line, if in use. Is the line blocked or frozen? If so, once cleared the system should return to normal on its own after the pump can void its contents freely.

    Hope this helps others — these are issues I’ve encountered in the past, and the lack of clear troubleshooting for issues that upset these smart thermostats can be frustrating.

    • Paul, thank you so much for adding your comments to this article thread! Very helpful! Would you mind if we added them to the original article?

  39. Folks,

    I wanted to add a few items to this discussion, as I’ve found precious little info online that addresses issues and fixes I’ve experienced with my Nexia xl824 and Trane furnace/AC system.

    Troubleshooting: If no power to Nexia XL824 thermostat (blank screen, unresponsive), check GFI receptacle on furnace branch circuit for reset, then check breaker for furnace, then check the condensate pump (if one is in use). Note for systems that have condensate pumps that there may be up to three safety floats on the power line from air handler controller board to the pump: one near the trap toward the evaporator housing, a drain pan float and/or the pump alarm float, in order of the 24V AC current flow. If any one of those are tripped (open), that wire is the power (commonly Red) feed for the thermostat. Main board on air handler will blink 21 green, one red in normal state. The evaporator pan drain lines may have clogged with gunk, or the drain pump seized and failed. No power to the thermostat is normally a safety cutoff such as described above. Rectify that part of the problem and the thermostat will get power, reboot and be operational in 2-5 minutes. Be patient with the Nexia reboot process, as it can take a while.

    If the Nexia XL824 continues to reboot (software loading/initializing, Trane splash screen displays, goes all white and repeats), the controller board in the air handler has an issue or alert. One item to check is the condensate pump and its drain line, if in use. Is the line blocked or frozen? If so, once cleared the system should return to normal on its own after the pump can void its contents freely.

    Hope this helps others — these are issues I’ve encountered in the past, and the lack of clear troubleshooting for issues that upset these smart thermostats can be frustrating.

    • Paul, thank you so much for adding your comments to this article thread! Very helpful! Would you mind if we added them to the original article?

  40. I just installed the XL824 on my trane x https://uploads.disquscdn.com/images/e7e807200ced5ba3b78b408e43e52b04f60bd75516be7216c850ec334d5b3a14.jpg v95 furnace. I attached the wiring to the specifications and then insulation manual. I went through all the set up that initially go through. But I’m having issues because it only pumps out cold air and the heat setting. Can anyone help me with a possible solution? I’m pretty confident that the wiring is correct, and I attached a picture of what it looks like. Any help appreciated

  41. I just installed the XL824 on my trane x https://uploads.disquscdn.com/images/e7e807200ced5ba3b78b408e43e52b04f60bd75516be7216c850ec334d5b3a14.jpg v95 furnace. I attached the wiring to the specifications and then insulation manual. I went through all the set up that initially go through. But I’m having issues because it only pumps out cold air and the heat setting. Can anyone help me with a possible solution? I’m pretty confident that the wiring is correct, and I attached a picture of what it looks like. Any help appreciated

  42. How do I remove the “screen lock” on my thermostat. I enabled screen lock so that others would not be able to change the temp. Also, my WiFi changed and I need to update the information.

    • On the home screen hit MENU->SCREEN LOCK->OFF->APPLY

      On the home screen hit MENU->SETTINGS->NETWORK->CONNECT TO WIFI NETWORK and enter your wifi access code and apply

    • I tried that. From the menu it’s not letting me go to settings, message saying screen lock is active at the top of screen.

    • Try pressing and holding the “MENU” button for 5-10 seconds. It should temporarily turn off the screen lock so you can access the other functions.

    • It finally worked! Man you are a life saver. I was not holding it down long enough. You are blessed to be a blessing. Thank you

  43. How do I remove the “screen lock” on my thermostat. I enabled screen lock so that others would not be able to change the temp. Also, my WiFi changed and I need to update the information.

    • On the home screen hit MENU->SCREEN LOCK->OFF->APPLY

      On the home screen hit MENU->SETTINGS->NETWORK->CONNECT TO WIFI NETWORK and enter your wifi access code and apply

    • I tried that. From the menu it’s not letting me go to settings, message saying screen lock is active at the top of screen.

    • Try pressing and holding the “MENU” button for 5-10 seconds. It should temporarily turn off the screen lock so you can access the other functions.

    • It finally worked! Man you are a life saver. I was not holding it down long enough. You are blessed to be a blessing. Thank you

  44. Got an entire new Trane system recently and sprung for the XL824 with proper new compatible wiring between the two. Sure has more bells and whistles than we’ll ever use including Wi-Fi. It seems to have made some schedules we didn’t ask for, and house freezes at night with a/c turned down so low to 62 even though we set it at 78 manually. Then jumps to 88 in daytime. The manual doesn’t match my thermostat, mainly on page 7 under Settings there is no Restore icon to return to factory settings. Maybe I need a different manual to download?

  45. Got an entire new Trane system recently and sprung for the XL824 with proper new compatible wiring between the two. Sure has more bells and whistles than we’ll ever use including Wi-Fi. It seems to have made some schedules we didn’t ask for, and house freezes at night with a/c turned down so low to 62 even though we set it at 78 manually. Then jumps to 88 in daytime. The manual doesn’t match my thermostat, mainly on page 7 under Settings there is no Restore icon to return to factory settings. Maybe I need a different manual to download?

  46. We had a new Trane HVAC system with an XL824 installed just over a month ago. I’m finding that sometimes the “Indoor Temp” reading matches the temp on my carbon dioxide detector and sometimes it’s off by 4 or 5 degrees (the Trane indoor temp is always higher than the CO2 detector). Where is the indoor temp on the Trane actually measured? Is it measured at the location of the thermostat or the furnace? And what would explain the inconsistency in the measurements when compared to my other temperature sensor? Thanks.

  47. We had a new Trane HVAC system with an XL824 installed just over a month ago. I’m finding that sometimes the “Indoor Temp” reading matches the temp on my carbon dioxide detector and sometimes it’s off by 4 or 5 degrees (the Trane indoor temp is always higher than the CO2 detector). Where is the indoor temp on the Trane actually measured? Is it measured at the location of the thermostat or the furnace? And what would explain the inconsistency in the measurements when compared to my other temperature sensor? Thanks.

    • It is true. Though it takes an incredibly long time and not all photos load correctly for the display sizing.
      This seems like a feature that Trane is still working on.

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