Nest Thermostat Keeps Restarting? – Learn How to Fix

Wondering why the Nest thermostat keeps restarting? Let’s find everything in the guide!

Nest thermostats are one of the most trusted and reliable smart devices, but sometimes they will automatically begin to restart and disturb the device’s performance.

Don't worry, if you're having trouble with your Nest thermostat, this is the guide for you!

There are many factors that’ll cause the Nest thermostat to restart continuously and this can happen due to any hardware or software fault. To fix the issue, inspect all components responsible for the power delivery of the device!

Now let’s discuss the causes of the thermostat restarting itself in more detail!

Why Is Nest Thermostat Restarting Itself?

If your Nest thermostat is randomly restarting, there is undoubtedly a problem with the device that is preventing it from functioning properly.

Many users have experienced this rebooting problem, therefore we’re here to assist you quickly fix it. 

But before we move to discuss the troubleshooting solutions, it is quite important to first get aware of the possible causes of this issue.

So here’s what might be causing all this fuss!

• Poor Network Connectivity on the Thermostat
• Low or Defective Thermostat Batteries
• HVAC Tripped Breaker
• Faulty Thermostat Wiring
• Loose Connection of Display Screen
• Thermostat Blown Fuse  
• Clogged Or Dirty Thermostat Air Filter

Next, let’s discuss the troubleshooting methods for this thermostat restarting issue:

How To Fix When Nest Thermostat Keeps Restarting?

As we now have a quite sufficient understanding of the causes, we can easily troubleshoot the issue.

It’s only important to remember to not skip any method and its implementation steps to be able to solve the Nest thermostat restarting problem in a matter of minutes!

Solution #1 Check Your Internet Connection

It has been observed that when the Nest thermostat’s network connection weakens or becomes incompatible, the device will start to produce various issues such as restarting.

There is a chance that the network connection is fragile or not there so let’s make an inspection! 

• Test the WiFi that your Nest Thermostat is connected to!

Here is how to check the internet connection – WiFi:

1. First, reboot the thermostat and router by turning them off.
2. Wait for 2 to 3 minutes.
3. After that, turn on both devices.
4. Next, ensure your WiFi availability! 
5. Connect your Nest thermostat to the WiFi.
6. Test the WiFi by connecting to a mobile device. 

In addition, ensure that your home WiFi settings are compatible with the Nest thermostat.

It’s important to use the 2.4 GHz broadband of your router until you’re finished with the guide.

This is important since the 5Ghz broadband is not supported by 2nd generation Nest thermostats.

Note: You can switch from 5Ghz to 2.4Ghz from the router’s settings!

Solution #2 Update Nest App

Whenever the Nest thermostat is connected to a network and the most recent firmware is available, it typically upgrades its firmware automatically using the Nest app.

Therefore, updating the Nest app itself is equally important as upgrading the thermostat firmware.

The thermostat updates automatically but not the Nest app on your mobile so it’s important to carry out any available firmware upgrade before moving on.

Here is how to update the Nest app on mobile:

1. Go to your mobile Play Store or App Store.
2. Search for the Nest App on the search bar.
3. Tap on the Update button in front of the app name.
4. Wait for a while until the app updates itself.
5. Once it updates, the thermostat will automatically upgrade as well.

In case there is no update available for the Nest app, then reinstall the app and make sure that your mobile and thermostat are connected to the same WiFi network.

If the thermostat again continues to reboot, then check the wiring and its power supply by following the next method!

Solution #3 Check Thermostat Power Supply

Despite having a battery, the Nest thermostat needs a continuous power source to function properly.

Your Google Nest thermostat keeps restarting because it isn’t receiving voltage and the issue often occurs when the HVAC circuit breaker is turned off. 

Note: The Nest thermostat will also start restarting when the C wire becomes loose or faulty!

Here is how to check the Nest thermostat power supply:

1. First, go to your home HVAC System Panel.
2. Make sure that the circuit breaker is turned on if it is tripped previously.
3. Moreover, also check the wiring of the thermostat.
4. To check the wiring, simply remove the Display Screen from the wall.
5. Locate the C wire from the Nest thermostat and make sure it has no fault.
6. Also, look at other wires as well and check their ends for any burns.

If you found any wire end defective or corroded, then you need to replace them immediately.

This is important because it can lead to fire hazards or also cause other issues!

Solution #4 Inspect The Thermostat Display Screen

The thermostat frequently experiences problems with the display screen that force it to restart again and again.

If the display screen is not properly aligned with its base, it won’t communicate with the other components and make your Nest thermostat constantly restart.

It is crucial that the Nest thermostat display screen is properly fixated on the base!

Here is how to inspect the thermostat display screen:

1. First, turn off the thermostat Power Supply.
2. Then, hold the Display Screen and take that out from its base.
3. Check if there is anything stuck or clogged on the display screen sides. 
4. If there is an obstruction, then remove it.
5. Next, hold the display screen and properly allocate it to its base. 
6. Also, check if while fixing the screen, there is any wire causing a hurdle.
7. Then, properly allocate and connect the display screen on the base.

When you’re ready, turn on your Nest thermostat and check whether the device will start restarting after a few minutes of work.

If yes, then proceed to the next solution!

Note: In case the thermostat screen remains blank, you might need a replacement.

Solution #5 Replace Thermostat Batteries

If the thermostat keeps restarting even after applying the fixes above, it may be that it is receiving a proper power supply, but the batteries are defective.

The batteries on a Nest thermostat can be removed and changed when they are worn out so it’s not a big deal. 

Since the HVAC automatically maintains charging while the batteries are in good condition, it is obvious that they have failed and must be replaced.

Here is how to replace the thermostat batteries:

1. Stop the Nest thermostat Power Supply.
2. Then remove it from the wall.
3. Locate the Battery Compartment cover and remove it.
4. Then, take out the batteries and set up a new set of batteries inside it.
5. Close the cover and connect the thermostat back to the wall.

Simple as that your Nest thermostat now has a fresh battery. In case you’re wondering what’s the best possible deal we strongly recommend the 450mAh Nest Battery Replacement.

The lithium polymer battery will keep your Nest thermostat working and not restarting!

Tip: While waiting for the delivery, there is one more thing that you can attempt at home!

Solution #6 Reset The Thermostat

Resetting the Nest thermostat can occasionally be effective when no other approach works.

Here we’ll learn how to factory reset your Nest thermostat if you’ve previously tried the other alternative solutions in the guide. 

Even though you will need to set up the device again after a device reset, there are situations when it is worthwhile to do so because the issue will be quickly resolved.

Here is how to factory reset the Nest thermostat in easy steps:

1. Open the Nest Mobile App.
2. Go to the app Settings.
3. Select All Settings and Reset the device.
4. Once the reset is complete, the thermostat should not restart.

If the issue continues and your device keeps restarting, there may be a problem with the device itself or with the way the thermostat was installed.

Therefore, you must seek the help of a qualified technician to fix the issue. 

With a bit of luck, you won’t have to pay much for a repair so good luck!

Quick Recap:

Whenever your Nest thermostat keeps restarting, check your network connection, update the Nest App to make sure the thermostat upgrades to the latest firmware.

The next step is to check the Power Supply and make sure that the display screen is fixated properly! 

Keep following us for more Nest troubleshooting guides!