How To Charge Nest Thermostat?

For most people, the Nest Thermostat works great. At the same time, others get frustrated due to weak battery health. With a few possible issues, the battery can get low and drained.

The only solution is to charge your Nest Thermostat and manage temperature settings.

There are a few ways to charge the Nest Thermostat. You have to first check the battery levels before finalizing if it needs any charging.

You need to learn ways to charge Nest Thermostat. Also, you need to know the ways to fix the problem if your Nest thermostat is not charging.

The Nest Thermostat is the best and most popular smart thermostat. This smart appliance familiarized many people with their first smart home device buy.

Do You Have To Charge Nest Thermostat?

The Nest Thermostats self-charge their batteries. Smart devices use the wires of your heating and cooling systems for this. In this case, it does not need any effort of setting on your part.

But if there is low power or low battery, you might face interruption in Nest’s functionality.

Such as, it won’t connect to Wifi, or sometimes it will be just placed dead on the wall, and nothing will be happening.

This indicates that your Nest Thermostat needs immediate charging to resume functioning. 

You can recharge the Nest thermostats given hereunder:

  • 1st Generation Nest Learning Thermostat
  • 2nd Generation Nest Learning Thermostat
  • 3rd Generation Nest Learning Thermostat
  • Nest Thermostat E

Usually, the Nest Thermostat doesn’t need any charging.

The appliance works well with a minimum operating level.  It auto-charges from the sufficient power supplied by the HVAC unit in your home.

However, there are several ways to charge the Nest Thermostat. But before that, you must check if it needs charging or not.

How to Maintain Nest Thermostat Battery Health?

If you charge any electronic device without the need for charging, its battery health will deteriorate.

Your Nest Thermostat communicates with you when it needs charging. Just stay aware of these common issues with Nest charging.

  • Follow the sign if the screen turns off completely like a mobile phone.
  • Use the app to stay updated about the working of the thermostat.
  • Watch if the system disconnects from the Wi-Fi network
  • Observe if it reduces functioning and takes it as a low battery warning.

How Long Does the Nest Thermostat Battery Last?

If your Nest thermostat has your home wiring, it won’t need recharging. Your Nest thermostat unit is working hard continuously to adjust your home temperature.

You get notifications when you need to take some action for something going wrong.

It works on the continuous flow of direct power supply.

The battery charge usually lasts for up to two hours without any extra power supply. With being attached to the electricity in your home, its battery will always be charged.

It works for two years before the system battery needs a replacement.

If there is a power outage, your Nest device will only work for two hours. varying from model to model, you can charge it or replace the batteries. The Nest Thermostat takes AAA alkaline batteries.

Can You Charge Nest Thermostat With USB Cord?

You can resolve the eventual low battery problems of the Nest Thermostat using an appropriate USB cable.

The Nest Thermostat charges with a micro USB cable (Micro-B)for half to two hours. Note that if your Nest Thermostat is the first generation, you’ll need a mini USB (Mini-B) cable.

Time Required To Recharge The Nest Thermostat

The time varies depending on the current low battery levels for Google Nest Thermostats.

The thermostat takes about half an hour to recharge if the battery is low. Besides, if the battery is completely drained, it will need almost two hours to recharge.

How To Check the Battery Levels Beforehand?

You will learn how to charge the Nest Thermostat, but you also might need to add a common (C) wire transformer to it.

Nest Thermostat E needs a C-Wire to obtain enough power supply from your home electronics. lack of a C-wire in your home, then you’ll need to install one.

You should try the following best ways to check if your Nest device needs charging.

1. Check The Power Switch

Your home HVAC system might turn off while cleaning, remodeling, or during other incidents. This way, your Nest Thermostat will stop working.

A light switch placed next to your HVAC system controls its power issues. Ensure it is on.

2. Remove the Nest From The Wall & Charge

Nest Thermostat works as a wall charger as well. If your Nest is not charging, take it off the wall and charge it.

You might diagnose any issues with the Nest Thermostat, its wiring, or HVAC. After removing it from the wall, you can charge it using a regular phone charger. You have to connect it with a micro USB connection.

3. Use A Common Wire For Nest

Try this method if you have checked your HVAC system’s power button and charged your Nest off the wall.

You should put it back on the wall plate and see what it does. If it reads low power or not charging, you need to add a common wire transformer.

You might be facing wiring issues. A common wire transformer provides power to the Nest if your HVAC doesn’t charge the Nest well.

4. Replace The Nest Battery

Other than low battery issues, there can be a need for battery replacement. You should replace the battery only after passing through all checks explained earlier.

You rarely have to replace Nest Thermostat’s battery, but there is a slight possibility. 

How To Charge The Nest Thermostat With USB?

Most Nest Thermostats from Google come with a micro USB port used to charge the battery instantly.

Sometimes, it is also used for troubleshooting by the Google support team for Nest.

You can use the USB port on the back of the Nest Learning Thermostat battery charging port. Or use the Nest Thermostat E to recharge it when the battery is low.

You should go for the following steps given below:

  1. Pop off the thermostat display.
  2. Plug it into a power source (a USB port on your computer or a common wall charger) using a micro USB (Micro-B) to USB-A cable.
  3. Allow it to charge for about half an hour to two hours.

Keep an eye on the blinking red light at the top of the smart thermostat. When it stops blinking, it’s an indicator that your thermostat is completely charged.

What To Do If Your Nest Thermostat Battery Keeps Dying?

If you still feel you’re charging your Thermostat often for a long time, there might be something wrong with it or the battery. The reasons its internal battery is draining quickly might include:

  • The batteries need replacement.
  • The constant power supply from your home circuit breaker’s main grid is not flowing through the Nest Thermostat properly. You may need to. You’ll have to install a common wire to fix this issue.
  • Any fuse might have blown, and it is left unattended in the circuit breaker. You will have to reset the section on the circuit breaker.

Any of the reasons mentioned above might hinder your Nest Thermostat’s working. You should take action to fix them. In case none of these work, contact Nest support to get help.

How Can You Use Nest Thermostat Energy-Saving Modes?

While getting to know your device, you’ll be glad to know that your thermostat has built-in energy-saving modes.

They help extend your battery life and enhance performance. They also prevent the possible issues of “low battery.”

There are two energy-saving modes:

  1. · Off Mode.
  2. · Off Eco Temperatures.

Going out for a few hours’ business trips? For a family gathering, let’s say, and you want to save power, the Eco Temperatures are best for you. Whereas, Off Mode will work for longer trips of a week or month.

How Can You Activate Eco Temperatures?

You can auto-set the Eco temperatures or do it manually.

Activate Eco temperatures Automatically

To auto-activate the Eco Temperatures, do the following steps:

  1. Open the Nest or Home app.
  2. Select Away.

The Nest Thermostat detects that nobody is home, it auto sets to Eco temperatures.

Activate Eco Temperatures Manually

If you wish to change it manually, follow these steps:

  1. Open the Nest or Home app.
  2. Select Thermostat.
  3. Select Settings.
  4. Choose Preset.
  5. Tap Eco.

How Can You Activate Off Mode?

The Off Mode maintains your home temperatures without shutting down the device. You can always control the device remotely as it stays online.

1. Press and hold the touch bar.

2. You’ll see the turn-off option on the screen. Side the touch bar to Turn Off.

3. Press the touch bar.

Let your wallet thank you after this!


I have been using the Nest Thermostat device for over a year now and am completely satisfied with the experience. It’s simply wonderful for my gas heating, and cooling forced air system.

The switching between AC and furnace surprises me. Nest Thermostats are a great way to check, adjust and maintain your home heating and cooling while lowering your energy consumption and costs.

Knowing when to charge your Nest device makes it super convenient for you to optimize the temperatures of your home so conveniently without the hassle of charging it over and over again.

Learn more about Smart Home Security