Nest Thermostat Won’t Turn On [Try These Fixes]

Having access to your home temperature, and controlling it with fingertips could be the most thrilling experience using smart thermostat over the old models. Smart thermostat gives users access to control their home temperature throughout the day using a schedule, with add-ons functions such as sensors and Wi-Fi connectivity for better performance.

You must be having a hard time putting On your Google Nest thermostat as it seems unresponsive after its low on power. In spite of placing the screen on the base station to recharge the battery, did your Nest thermostat seem dead as it refuses to power on?

There’s no need to fret. We’ve got a few proven fixes you can try out. In this post, you’ll learn the quickest troubleshooting method you can adopt for fixing the Nest thermostat powering issue you might be facing.

However, I know you must have asked yourself sorts of questions concerning the unresponsive Nest thermostat. Thinking about why your Nest thermostat is not powering on? See the reasons below.

Why Won’t My Nest Thermostat Turn On

Basically, the Nest thermostat should power up when connected to its base, while the base also needs to be connected to an active power outlet to charge the device. Apparently, the Nest thermostat may switch to standby mode while its screen switches off if it doesn’t sense motion for some time.

The Nest thermostat is equipped with a rechargeable lithium-ion battery which sustains the device whenever it does not receive any power from the base, in case of power outage. With the screen off, the device uses its inbuilt battery that lasts for up-to 12 hours without interruption.

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Due to some unforeseen reasons, you find your Nest thermostat unresponsive when the battery power runs out. Low battery power always appears to be the most common cause of unresponsive or dead Nest thermostat. In case the display isn’t properly connected to the base.

The device will probably run on its battery power for some time, but due to the device age, and likely temperature level, the Nest thermostat will consume more power to run which reduces the battery uptime and makes it drain faster than expected. In most cases, the device may seem unresponsive and won’t turn on because the battery has run out of juice entirely.

In case you only noticed a blinking red light on the thermostat while it won’t turn on. Actually, the blinking red light on the Nest thermostat means the device is currently receiving power from its system. You must be expecting it to turn on while it’s being charged.

Although, the device is programmed to work appropriately whilst connected and receiving power from the system. This process tends to happen in other ways as the Nest thermostat won’t turn on in spite of indicating the charging light, because the battery loses its power entirely.

This might take longer than expected and eventually keeps you worry believing something is definitely wrong with your Nest thermostat. Actually, the Nest thermostat will turn back on automatically after the battery is charged.

In some instances, you may be noticing a green blinking light from the Nest thermostat as it seems unresponsive. The green indicator on the device signifies the thermostat is currently in an updating process, which can take a while before it’s accessible. Sometimes, the updating process might take longer than expected which requires a tweak for it to work.

Here are other possible cause of unresponsive issue on your Nest thermostat;

  • Incompatible Electrical System.
  • Damaged power cable.
  • Thermostat Wiring Issue.
  • Damaged Nest Thermostat.
  • Inappropriate Thermostat and System Connection.

How to Fix Nest Thermostat Won’t Turn On

Ensure You’re Using Compatible System

The Nest thermostat are made in different forms which shares similar looks and even makes it hard to identify the type of Nest thermostat you possess. From first to the third generation including the Nest thermostat E. All thermostats are designed to work with the appropriate system.

Connecting your Google Thermostat to an incompatible system can prevent the device from charging, as it won’t receive appropriate power to charge and may likely damage the device on a long run.

Seeing that Nest thermostat uses the electric power from the system’s wires to recharge its internal battery, in order to stay active even when the system loses power connection.

The Thermostat is programmed to present and guide you through a custom wiring guide for proper installation in which it looks into the device compatibility and tells if the Nest thermostat will be a perfect match with the type of electrical system you own. In case you just bought a Nest thermostat for an old replacement.

Ensure the Nest thermostat is connected to a compatible system while it receives power for charging its battery. To confirm your Nest thermostat compatibility, you can use the free Nest compatibility checker website. Additionally, there are chances that Thermostat is only connected while it doesn’t receive any power for charging due to the bad system.

However, you can easily confirm if the base is constantly receiving electrical power that’s capable of powering the Nest thermostat or not. Get closer to the Nest thermostat and unplug the system power cable from the wall outlet, or switch the power controls to your system. After a while, turn it back On.

In case you noticed a red blinking indicator as you power on the system power control, this implies the thermostat has started recharging itself from the base connector which will take a while before it comes up. You can skip to the third fix which guides how to speed up the thermostat charging process.

Reconnect the Thermostat to the Base

Inappropriate connection of the Nest thermostat with its base system can probably prevent the device from charging as expected and makes it use up its battery power without you knowing. Unknowingly, the Nest thermostat may not sit well in its base the last time you removed it.

In some cases, the Nest thermostat charging contacts might have got stuck or blocked from aligning from that on the Nest system. Most of the time, some cables may be sticking out from the wall which will be preventing the thermostat from connecting appropriately.

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To simply fix this, you’ll firstly need to remove the device from the system, then have a closer look to detect any blockage that might be preventing the thermostat from sitting as expected. Ensure there ain’t any cable in the way of the device. If there’s any, adjust it while pressing it back to its appropriate location.

Grab the Nest thermostat and take a closer look if there’s anything on it charging contacts before trying to put it back to its system. Now put it back to the base; Line up the display and base connectors to make sure the connectors align, then press the device straight onto the base until you hear it click into place.

The thermostat will then come up with the red blinking light (charging light), which will probably power up after a while if nothing is wrong within the thermostat wiring. In some cases, the red blinking light may continue for up-to an hour if the Nest battery drains off completely. This process can likely be accelerated with the next affix.

Power Up the Thermostat With a USB Cable

Nest Thermostat Won't Turn On? Try These Fixes

When the Nest thermostat won’t turn on as it refuses to power up after signaling the red light for hours. This may likely happen when the device battery is long dead. You can simply utilize the charging port located beneath the Nest thermostat for emergency purposes such as this.

Grab a working USB cable and a standard adapter which you can use to recharge the Nest battery power. As it’s mentioned on Google Nest Help platform, always avoid using a computer USB port or unpowered USB port for charging your thermostat as that might endanger the battery life span.

Put in the charger and plug the adapter to a working power outlet for charging. Wait for several seconds or a minute for the device to power up itself. As it turns on without sensing its system since you’re charging it with a USB cable, the device will prompt a message instructing you to connect it to the base for proper functioning.

Center the device and put it into its base by pressing it firmly until you hear it click into place. Now start the device manually or go ahead and access it from any smart devices which you have on the same network as the Nest thermostat.

Inspect the Thermostat Wiring

Nest Thermostat Won't Turn On? Try These Fixes

As improper wiring can also make the Nest thermostat won’t turn on. If any of the wire is not inserted properly or crooked at the outer part of the thermostat base, this can prevent the device from charging not until you reinsert the wire.

To do this, turn off the base power and remove the Nest thermostat from its station. Check and rectify any wiring issue before placing the device back to its system. Power up the base and wait for several minutes to see how things works out.

Check for Damaged Nest Thermostat

Nest Thermostat Won't Turn On? Try These Fixes

And also, take a closer look at the Nest thermostat in case the device is damaged by wrong wiring or power surge from the base. In rare cases, your Nest thermostat may seem unresponsive if any of its components have been damaged without you knowing.

To actually confirm the issue isn’t with the thermostat base nor with the charging wire that power it. You can apply an old thermostat that supports the system, to confirm if the system will power it up appropriately, and charges the thermostat battery.

On such occasions, turn off the system power then put in the old thermostat. Turn on the system to see its behavior. In case you noticed betterment than the previous thermostat you removed, this hinted that something is wrong with your Google Nest thermostat. 

However, you can consider buying a new thermostat if the current one is older enough to develop faults on its own. Also, you can get in touch with Google support system for support or book an appointment with certified technicians for proper installation of your Google Nest thermostat.

Reconnect the Thermostat Batteries

Removing and reinserting electronics batteries tends to work best most of the time while fixing any malfunction in the device system. It serves as an effective way for power cycling and rebooting the device operating system.

The same applies to every smart device that possesses an extra power source to keep it running while not connected to an electric power. Removing and reconnecting the Nest thermostat battery will probably reboot the device and fix and glitch in its function.

You can access your thermostat batteries by flipping the device over to see the down part, then grab a flat head screwdriver driver to pull out the two AAA batteries from the device. Wait for a couple of seconds or a minute before reinserting the battery. 

In case you own a Nest model with inbuilt battery, this will require you to unscrew the compartment cover with a Philip head screwdriver before you can access the battery. Take out the screws and gently pull up the back case because of the charging flex that passes through the case before it’s connected to the motherboard.

Wrapping Up

I hope you found this post helpful. In a simple word, your Google Nest thermostat may seem unresponsive or look dead as it won’t turn on due to many reasons, which can also be fastened with the few proven fixes mentioned in the body of this blog post.

The compatibility of the Nest thermostat with the connected base system matters most as that might avert your Nest thermostat from charging, and causes great worry if its battery power drains off totally. And also, improper connection of thermostat with the base is also a significant reason why Google Nest thermostat won’t turn on.

Apparently, this can be rectified by reconnecting the both devices appropriately. In case the issue persists in spite of trying each and every step mentioned above, you can get in touch with a local technician for proper support on the issue or schedule an appointment with a trained HVAC professional to take a closer look at your device.

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Frequently Asked Questions:

How do I manually turn on my Nest Thermostat?

Apparently, the Google Nest thermostat doesn’t possess a power button as it’s programmed to power on itself once it has enough battery power to sustain it operation for the meantime. If your Nest thermostat seems dead with no light, hold for some time as the device will power on automatically once it’s charged.

How can I tell if my Nest is getting power?

The Google Nest thermostat has a red indicator on top of the device which blinks when the device is receiving power from the base system. You may notice a blinking red light when the Nest is on the base with its battery down. This means the Nest is currently getting power from the connected base system.

Can a Nest thermostat run out of battery?

Yes, the Nest thermostat can probably run out of battery if it’s operated on its battery power without recharging it with electric power. The Nest thermostat battery may likely drain faster and run out quickly if the battery life span isn’t as strong as a new generation.

How do I reset the power on my Nest Thermostat?

You can easily achieve this by pressing your thermostat ring and holding it down until the screen turns off (about 10 seconds). Then let go of the ring. Press and release the ring to turn it back on and complete the restart process.

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