Nest Thermostat Troubleshooting (Easier Than You Think)

Nest thermostats are known for their sleek design, easy-to-use interface, and energy efficiency.

However, like all electronics, they are not immune to problems, that’s why we prepare this Nest Thermostat troubleshooting guide.

Some of the most common problems with Nest thermostats are power surges or excess heat.

If your Nest thermostat stops working, try these quick troubleshooting tips:

There are a few things you can do to help fix power surges or excess heat issues with your Nest Thermostat:

  1. Make sure your thermostat is properly installed and that all the wires are connected correctly.
  2. If you have a smart home setup, make sure that your Nest is included in the “Home” group.
  3. Try disabling some of your other home gadgets (like smart TVs, appliances, etc.) to see if that helps reduce the amount of power surging through your home.

This blog post will cover some other common issues that can occur in the Google Nest Thermostat smart device. 

Now, let’s get started with the Nest Thermostat troubleshooting guide.

Common Issues in Nest Thermostats and Their Troubleshooting

Nest Thermostat Troubleshooting: 5 Common Problems Solved

According to a report from a verified source more than 30 million Thermostats have been sold in the USA.

While the NYT survey declares that the Nest thermostat is the best product and most of the users have this smart device in their homes.

However, it’s also endorsed that the users frequently have some common issues with the Nest Thermostats that I’m going to discuss below. 

1. Nest Thermostat Blowing Hot on Cool Temperature Settings 

Nest Thermostat Blowing Hot on Cool Temperature Settings

Many users experience hot air blowing from their thermostats while their device is set to cool.

Well, this problem involves mainly the heat pump system, and it refers to the heat pump might be faulty.

It is also possible that the thermostat wires are not fully inserted, which can result in the wrong heat or cooling behavior. 


  1. The quickest solution is to check that all the wires are fully inserted. 
  2. Then start a diagnostic test by setting the thermostat to cool mode. Decrease the target temperature until you see a blue light on the display screen. Hold down for a few seconds and check the vents to ensure they are emitting cold air.  
  3. Another solution is, to open the Home app on the mobile and select thermostat. Go to setting and find the heat pump. Change the setting of O/B, for example, if the pre-setting is O, change it to B, if it’s O, then turn it to B. 

2. Unable To Update Sofware of New Thermostat

Unable To Update Software of New Thermostat

Are you getting pop-ups like “No network”, or “Unable to Check” when you try to update the newly bought thermostat smart device? Then there are solutions. 


  1. If you receive a message Unable to Check then wait for a while and try again. It’s because the new device shows some issues in connecting with the Nest Service. 
  2. If you see No Network then go to settings. Check the connected device, if the thermostat is already added, remove it once and then add it. 

3. Nest Thermostat Bluetooth Connection Troubleshooting 

If you tried to connect it to the Nest thermostat for the first time, it failed, or it was initially connected and then disconnected.

Follow the below guide and fix the issue. 


  1. The quick fix is to check your phone’s Bluetooth. Click on the Bluetooth, and turn it on. Turn on the Nest Thermostat. And try to connect them. If it doesn’t work then turn off both devices and then turn them on. 
  2. Make sure you’re sitting much closer to the device. I suggest you try connecting BT within 12 inches radius. 
  3. Another solution is, to disconnect all other devices once, then try first to connect the Nest Thermostat. 
  4. You can also pull off the device batteries. Wait for 30 seconds, and then pull them inside the thermostat. Let the device be completely on, and then try to connect. 

4. Nest Thermostat Internet/Wifi Troubleshooting 

Nest Thermostat Internet/Wifi Troubleshooting

A wifi connection with the Nest thermostat is required to keep it working.

But if your device is repeatedly disconnected from the internet then it can be a hectic problem.

Let’s take a look at how to fix the offline Nest thermostat issue


Make sure the wifi issue is in your device not on the internet.

You can test it by connecting your phone and device with the same wifi if the phone is working but the thermostat is not then it means your device has the problem. 

  1. Turn off the device and wait for 30 seconds. Turn it on and try to connect it with the wifi. 
  2. The wifi router needs to place near the thermostat device or increase its distance limit. At the same time, internet speed should be high. 
  3. If the device is disconnecting from the wifi frequently, check the router setting or wifi interface. 

5. Nest Thermostat Blinking Red 

Nest Thermostat Blinking Red

The Nest thermostat blinking red is a sign that the device’s battery is low.

Red is only one sign, if the battery is low you may also see a low battery message on the screen, a blank screen, or the home sign on the display. 


Typically the Nest devices are set on auto-charge mode, which means if your battery gets low the thermostat should charge automatically.

But for this make sure the HVAC system wiring is connected to the device.

Frequently Asked Questions (FAQs)

What is the purpose of the orange light on the Nest thermostat?

The orange light starts glowing on the Nest thermostat means, it’s the pre-sign to the user that the battery is getting low.

Once the battery is low the light will turn into red blinking. Users can turn the orange light off by connecting the smart thermostat to the charging. 

How to turn on the Nest thermostat manually?

Connect the C wire to the Nest thermostat to turn the device on manually.

Another way is by using the Nest app home screen. Open the thermostat option and click on Manual. 

Why I don’t receive notifications and emails from Nest?

Your emails and notifications are turned off. To receive the emails and notifications from the Nest make sure you’ve allowed the website to send you emails. 


Nest Thermostat is a great way to keep your home cool and cozy.

The smart device keeps the home temperature optimal according to your health that gives you a comfortable feel throughout the day.

But the problems are part of the game. The core point to keep the device active is to inspect the C wire frequently.

If wireless, keep the internet connection fast and accessible to the device. 

You can apply the above-mentioned solutions if you face any of the issues. Use can also contact the Google Nest helpline if they are unable to solve the problem.

Furthermore, the Google community can also help you to troubleshoot the Nest thermostat. 

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