A Thermostat is simply a device that helps us adjust the temperatures in our homes. The simple act of replacing an inefficient thermostat can have big effects such as lower monthly energy bills, because it will ensure that the HVAC system runs more efficiently. The task is surprisingly simple so the big question is, how do you replace a Trane Thermostat?

Replacing a Trane Thermostat can be a very straightforward and manageable task even for a DIYer. With the goal being to replace the thermostat in a swift yet efficient way, the first step is definitely, to choose a thermostat that is compatible.

I know that home electrical repairs such as replacing a Trane thermostat sound like a huge, complicated headache, however, scroll down to see how simpler this task can be, as long as you have clear directions on where to start.

Step-by-step Trane thermostat replacement

Step 1 – Select the type of thermostat I want.

When selecting the type of thermostat, I want, it would be important to compare. With so many existing options, it would be important to choose a thermostat that is well-suited to the unique needs of the home.

It is also important for the replacing thermostat to be compatible with the existing system. Trane Thermostats may vary from regular ones, programmable, to smart ones.

Basic information therefore to look out for when selecting the type of thermostat would be the number of heating and cooling stages that the thermostat supports (is it one stage or multistage?), and also, say for example I wish to replace a regular thermostat with a smart one, it’s important to be aware that smart thermostats need a common wire (c-wire) to operate. It would be useful in this case, therefore, to be aware of the already existing wiring before selecting a type of thermostat, so that it matches the existing system.

Step 2 – Reading Trane’s owner’s manual for instructions.

Trane’s manuals will definitely give useful information on the inner workings of the replacing thermostat, from technical details to safety information, to simple do-it-yourself tips and tricks. I would definitely emphasize then that it would be useful to read the manual! There are age-long traditions on installation methods for most thermostats however, wouldn’t you agree that it’s more useful to just get directions from the manufacturer of the specific product that you’re trying to install?

It is important to make sure that everything matches detail for detail, just as it is explained in the manual so reading it would be the safest bet.

Step 3 – Switching off the power to my thermostat.

Switching off the power to the thermostat as I remove the old thermostat and replace it with a new one, is a vital safety measure. One should check the breaker box to find the switches to the furnace, air conditioner, lights, washer, bath, thermostat, etc.

Step 4 – Removing the old Thermostat

The general rule of thumb is that the thermostat will slide upward from where it is connected to the wall. However, there’s always an exception to the rule so, it’s important to deal gently with the thermostat while attempting to eject it. If the thermostat was placed against a wall plate, loosen the screws attaching the plate to the wall. Everything needs to be detached until the only thing visible, is exposed wires and bare walls.

In case I noticed that the wires exposed are also corroded, and there is enough length left, then the way forward would be to re-stripe them. If not, then the alternative would be to use a knife to scrape the ends of the exposed wires, until they shine.

Step 5 – Take note of the existing wiring as I continue to disconnect the old thermostat.

To keep track of the previous wiring, I find it useful to either write down the connections for the sake of remembrance or alternatively, I’ll suggest taking photos; I would carefully note each wire and its matching connection on the thermostat base.

Labeling both, and taking that down on paper would be an efficient way to go about it.

Similarly, for wires that were loose and unconnected to the thermostat, (perhaps as an aftermath of a previous installation by an amateur), those too I would label, and capture them in a photo. I would as well, recommend at this stage that the disconnected wires are kept out of the wall (eg. by taping them together to the wall) being that an otherwise straightforward process would be made highly strenuous if a wire were to be lost.

Step 6 – Re-installing the wall plate.

At this point of the process, I already know which wire was connected where (with the previously existing thermostat, and assuming that the previous one had been wired correctly), and I already have with me, the new replacing Trane Thermostat.

The next step for me would be to re-install the wall plate. The wall plate would actually be a useful guide to show me where, precisely, I need to drill holes to screw in the plate. I would make sure that the drilled holes match the size of the screws that I have.

Step 7 – Replacing the Trane Thermostat

Using preserved aids being either photos or labels (or both), this is the point at which I will make sure that I accurately reconnect the wires to the replacing Trane Thermostat.

The conventional way of doing it is to twist the wires onto the Thermostat connectors. In case of any doubt, I would seek the advice of a specialist in this area.

Step 8 – Replace the thermostat on the wall.

First and foremost, if there be any extra lengths of wires protruding from the wall, I would replace them back into the wall.

The next step here would be to place the thermostat against the wall, just above the wall plate so that I can slide it down into the place where it will rest on the re-installed screws drilled onto the plate.

Step 9 – Switch back on the power to my Trane Thermostat

In the breaker box, this is the point at which I will re-activate the power back to the Trane thermostat. It should flow and function after a few minutes. If the thermostat does not work properly, perhaps I would retrace my steps to see where I went wrong, and if it still does not work, then maybe it would be wise to consult my local dealer in HVAC system installation.

Which thermostat is compatible with Trane?

Most replacement thermostats are compatible with common systems such as Trane.

It is equally true that there is always an exception to the rule and so it’s possible to come across a system that is unique which will mean that it is then difficult generally, to find a replacement thermostat for such a system, however, the general rule of thumb is that Trane is compatible with most common systems.

Can I replace my thermostat myself?

Reasonably, some people may prefer to hire a professional thermostat installation company, especially for a programmable thermostat installation, which actually is both a reasonable and smart move, however, it is important to remember that learning how to install a thermostat helps to keep costs low, and it can also prove to be a useful skill in the long run; it’s hard really to go wrong with curiosity and acquiring of useful knowledge.

Replacing my thermostat may seem like a very intimidating task however, I hope that with this article, I have been able to show you that replacing a thermostat can be, and is in fact, a very straightforward and manageable task, even for a DIYer.

Things I should do before replacing the thermostat

  1. I would make sure that the thermostat that I want is compatible with my HVAC system;
  2. I would make sure that the thermostat I intend to purchase is suitable for the needs of my home;
  3. It would also be reasonable to choose a thermostat that is in tandem with my financial reality;
  4. I would take photos of the existing wiring just to ensure that I am able to replace it accurately;
  5. I would have all the required tools at hand; wires, cutting tools, drilling tools, screws, etc. and
  6. Most importantly, make an informed decision as to whether I would want to hire a professional installation company, or do it myself.

Final verdict

Whereas replacing my own Trane thermostat is a straightforward and manageable task, it is vital as well before embarking on this task to make a rational decision as to whether it is reasonable to hire a professional or DIY.

Trane Thermostat Replacement FAQs

Q: Will the Trane tcont802 thermostat show stage 1 or stage 2 on the screen?

A: No, that information is not usually displayed on the Smart Thermostats Screen, but it is available in the owner’s manual.

Q: Can a tenant tamper with the thermostat and break installed by a landlord?

A: Indeed, being that the actual gadget is physically in the tenant’s home, it is very possible for them to tamper with it, however, the contract of lease, ideally, should cover a compensation plan in the event that this happens.

Q: Does Trane make a Smart Thermostat?

A: Indeed, it does. Some of the Trane Smart Thermostat models include XL824 Thermostat, XR724 Thermostat, Comfort Link II XL1050, and Comfort Link II XL850. You can find more info here: does trane make smart thermostats


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