Finding Lennox iComfort Thermostat Problems and Fixes

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Finally! After a long selection period, you bought the Lennox iComfort thermostat.

Unfortunately, it started to show problems and you don’t know how to fix them.

Trust me, this type of situation can make you feel really frustrated.

So, you searched on the internet,” What are the Lennox iComfort Thermostat Problems?”

Most of the time, the battery of the thermostat runs out. Thus the thermostat turns dead. Or, even the circuit breaker of your home can shut down. Eventually, the thermostat may stop working. Moreover, if a thermostat has a defect, then obviously it won’t run properly.

Now, this was just an overview, For fixing these problems, you will need some deeper knowledge.

No need to lose your breath. I am here to help you with this article. It has all the facts to help you.

Let’s start the journey!

Browsing the Problems First

lennox icomfort thermostat troubleshooting

Before fixing the problems of the thermostat, let’s see what problems can occur.

For troubleshooting the Lennox iComfort thermostat, a detailed view is necessary.

And that’s what we are going to do.

First Reason: Dead Battery

The Lennox iComfort thermostats run on batteries. As usual, these batteries can run out over time.

Now, if there’s no battery then how the thermostat will work?

This is one of the common Lennox iComfort thermostat issues that you might face. While using the Lennox iComfort thermostat.

The Lennox iComfort thermostats are not connected to any power source. Rather the battery works as the power source. 

After all, the Lennox iComfort thermostat is not turning on without batteries.

What to Do?

Whenever you see the Lennox iComfort thermostat is not working, check the battery first. 

If the batteries are not working then grab a new pair of batteries. And replace the old ones.

Besides, change the thermostat batteries frequently, say after every couple of years.

After all, most thermostat batteries for thermostats last not more than 3 years.

Maybe the Breaker Fell?

A silly yet famous reason for the thermostat problem. The circuit breaker fell.

Generally, a thermostat is connected to the central electrical system of the house.

Now, every main electrical system of a house has a failsafe breaker system.

Sometimes the breaker can fall because of unusual electricity flow.

As a result, the electricity gets temporarily stopped.

Guess what happens next? Obviously,  Lennox iComfort thermostat won’t turn on. Just like your JBL boombox will not charge without electricity.

Now What?

If you see that the thermostat is not working, no need to panic. Take a deep breath. And check the circuit breaker.

If the circuit breaker fell, pull it up again. The thermostat will start to work again. Without any fuss.

Moreover, try not to use any components that make the circuit breaker fall. These electrical components can draw more electricity than usual. Thus the circuit breaks. 

Need a circuit breaker? Check these out:



  • Brand: Square D
  • Current Rating: 15 Amps
  • Voltage: 120 Volts
  • Item Dimensions: 3 x 2.5 x 1 inches
  • Circuit Breaker Type: Standard
  • Mounting Type: Plug-In Mount
Square D Homeline Miniature Circuit Breaker

Square D Homeline HOM250 Miniature Circuit Breaker

  • Brand: Square D
  • Current Rating: 50 Amps
  • Voltage: 120 Volts
  • Item Dimensions: LxWxH 3.2 x 2.5 x 2 inches
  • Circuit Breaker Type: Standard
  • Mounting Type: Plug-In Mount

They are the best in their market. Definitely worth giving a try!

HVAC Error:

This is another Lennox iComfort Technical problem. Because of the error of the HVAC system, Lennox iComfort thermostat not working.

Usually, the thermostat contains a failsafe button. These button helps the thermostat to get the necessary amount of voltage to the thermostat.

Sometimes the button fails to work properly. As a result, the thermostat does not get the voltage. And it will show problems.

Not only that. The HVAC controls the temperature and humidity. With the help of this switch. 

When the heat or the humidity increases more than the desired level, it shuts down the thermostat. This way the switch prevents any type of anomalies. 

Now if the switch gets defected, neither humidity nor the temp will be properly regulated. 

Eventually, the Lennox thermostat will show problems.

Here’s What You Can Do:

To avoid such issues, you have to check the safety button first. Generally is placed at the air drain connected with the thermostat. 

Or, you can check the Lennox iComfort thermostat manual to find out the switch.

Also, you have to inspect the sensor that works with the button.

If either the sensor or the switch has any issues, then you have to replace them.


lennox icomfort thermostat not working

Obviously, the thermostat must cool during its operations. However, sometimes the Lennox Thermostats take more time in cooling than usual. 

Plus, the thermostat even takes time to cool when it does not even require cooling!

Normally these cooling issues take place because of system bugs. Or, the cooling components can get damaged.


To prevent unusual cooling, you can run some system scans. If there are any problems with the thermostat, you can identify them easily.

Moreover, always inspect the parts of the thermostat that works for cooling. If those parts have any problems then you have either replace them. Or you have to fix them.

You can do another thing. You can give the Lennox iComfort thermostat reset. This way, the system gets a factory reset. And the thermostat will also cool normally.

Well, this is all I had on Lennox iComfort thermostat troubleshooting.

If you see that the Lennox smart Thermostat not working, you know what to do!

Any More Questions?

What To Do If My Thermostat Fails To Locate PairedDevices?

Firstly, check whether the earlier device is still connected or not. Afterward, reactivate the system. Usually, after this, the problem can get solved. If not, then you have to clean the system. After cleanup, again manually connect the devices that you were not seeing.

Is There Any Way To Fix IComfort Communication Error?

Yes. You fix this issue. For that, you shut down all the previously launched programs. Then re-launch the MEmu. Usually, when you operate multiple operations in the background, they take a lot of space. Plus, if you are running other emulation software, turn them off. And the error will not happen.

Can I Remove The Lennox IComfort Thermostat From The Wall?

Yes, you can. To do so, first, you have to stop the electricity connection to the thermostat. Once it is done, take a knife. Now firmly pry open the thermostat with the help of the knife. After the thermostat is loosened, pick it off from the wall. That’s it.

How To Solve IComfort Connection Error?

You have to check your internet connection and then fix it. Generally, this problem usually happens because of the Wi-Fi connection error. So, check your router and restart it. Another reason can be that iComfort is already connected to another network. Therefore, check the iComfort’s connectivity.

Final Words

If you have reached this far, congratulations! You now know about all Lennox iComfort thermostat problems.

However, don’t hesitate to reach for any HVAC expert. If you have any confusion.

It seems I forget to turn on the thermostat in this chilling weather.

I going for now then.

See you soon!

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