Nest Thermostat Blinking Lights (100% Solved!)

If you’ve looked for smart home devices such as smart speakers, thermostats, smart locks, and so on, you must know about Google Nest.

If not, then let me tell you that it is a leading brand in the field of making smart home devices and products.

So, if you’re someone who’s using one of their products, known as Nest Thermostat, that conserves energy by optimizing the cooling and heating of homes, then this article is for you!

When using Nest thermostats, you might have to face uncertain blinking lights once in a while.

This might confuse you to understand the But don’t worry, I’ve got your back! In this article, we’ll understand what these lights indicate and how you can fix them.

It doesn’t matter whether the Nest thermostat you’re using is the first generation or the latest one, this guide is here for you for all the light problems that you’re facing.

So, let’s dig in!

Nest Thermostat Blinking Red Light

You might get scared seeing a red light blink. But let me tell you, a red light does not always mean danger. Sometimes, it indicates a low battery. And this is why your nest thermostat has a blinking red light.

Along with that, it is also possible that your thermostat screen will blackout, but that is because it’s running low on battery.

Now, what you should do is simple, charge it. It might get fully recharged within 10 minutes or it might also take an entire hour to finish depending upon your current battery status.

However, when your thermostat is not charging, you could go for a USB cable. It will charge your Nest thermostat directly. Once your thermostat is fully charged, it’ll start again.

Nest Thermostat Low Battery Fix

Nest Thermostat Blinking Green Light

You don’t have to worry about your Nest thermostat blinking green light. Greenlight usually indicates the updates. Your nest thermostat might be updating its software or just restarting.

It could also mean that your thermostat is installing some updates. This is because your thermostats usually receive regular updates from Google.

Most of the time, the general and software updates range from one to two minutes, not more than that. After this, the green light will stop flashing.

However, if your nest thermostat is blinking the green light constantly, then it indicates that your thermostat has stopped or frozen. This can also appear during installing a software update.

  • When your Nest thermostat has stopped, start with taking off the display from the base. And then rearrange it to make sure that all the pins are lined up accurately.
  • You’ll get to hear a click sound if you’ve arranged and installed it accurately.
  • If the screen of your thermostat doesn’t startup, don’t panic. Instead, push down the display for almost 10 seconds before letting it go.

Now, as your nest thermostat restarts, it’ll stop flashing the constant green light.

Nest Thermostat Blinking Orange Light

It is the most confusing moment when your Nest thermostat is flashing an orange light while working smoothly. You might get this orange light occasionally. So how do you deal with the blinking orange light? It is quite simple.

  • Charge your thermostat with the USB cable.
  • Start with removing the display of your thermostat.
  • Get a USB cable that fits your thermostat.
  • Based on the model you’re using; the USB cable would be either mini or macro.
  • Don’t use the regular computer USB cable for your thermostat.
  • The Screen will start up with the charging.
  • You will get a pop-up for connecting the thermostat back to the port.
  • Put your nest thermostat back on its base.
  • Now, lightly press your thermostat till you get a thick sound.

Nest Thermostat Blinking Yellow Light

Understanding a yellow light is simple. The Nest Thermostat is indicating that the connection between the heat sink and your thermostat is broken. As there is no Heat link in the US version, only the Nest thermostat with the European version faces this issue.

Nest Thermostat Low Battery Fix

Anyway, all you’ve to do is establish the connection again. However, the fixing changes as the models vary.

  • For the Nest thermostat E, look for the Heat link button for a status check.
  • If you’re getting a flashing yellow light, look for the display of your Nest thermostat. You can also check the app for some error codes.
  • For the Learning thermostat, the flashing yellow light indicates the disturbance in the bond with the Heat link.
  • Look for the error codes to fix the issue.
  • If you couldn’t do it by yourself, then it is better to ask for expert assistance.

However, even with the broken Heat link, the thermostat can still heat your home. You can do this by activating the manual heating system. Simply press the button in the center of the heat sink.

Nest Thermostat Blinking White Light

Getting a white light indicates that either the thermostat is reconnecting to the router or some software updates.

It also indicates the manual restart. If the white light is blinking, then you might also be facing difficulties starting up your thermostat.

For that,

  • Look if the heating and cooling wires are accurately connected within the thermostat.
  • Your thermostat should be properly put on its base.
  • If rearranging the wires and display doesn’t work, then restart your thermostat.
  • Press the thermostat ring for about 10 seconds till the display black off.
  • Now, you could set up your thermostat.

Nest Thermostat Blinking Blue Light

Getting a blue light is common. So, it usually happens during starting up your Nest thermostat. It usually stops after a minute or so. But if it doesn’t, then you have to fix it manually.

  • Look if the cooling and heating wires are connected correctly.
  • You’ve to ensure that the wires aren’t bending or sticking out. It should be within the connectors.
  • If it’s still not stopping then take off the display of your thermostat.
  • Lightly put it and press it back.
  • The pins should properly align within the connector.
  • You would hear a clicking sound.
  • Press the thermostat rings for about 10 seconds till the display black off.
  • Now, you could set up your thermostat.

Nest Thermostat Blinking No Light

You don’t have to worry when your thermostat is blank. It could be easily fixed. And yes, it is not broken. It simply means that your thermostat ran out of battery.

The screen will show up again as you recharge your thermostat. However, some things such as poorly installing the display inflated fuse, or broken wiring also lead to a blank screen.

  • Read just the display on its base.
  • Make sure the power button is completely pressed to the On state.
  • Your thermostat must be linked with suitable devices.
  • Your thermostat wiring should be accurately done.
  • Look for the blown fuse, if any on your main power board.
  • Check if your thermostat is working.

If it still doesn’t work, then ask for expert assistance. Or you can get the new latest Nest Thermostat from here!

Nest Thermostat Blinking a Mix Of Orange And Green Lights

Sometimes, you might face this combination. But don’t worry, these are common. Just follow the steps here to fix it.

  • Bring off the thermostat display from its base.
  • Get the compatible USB cable according to the model, either mini or macro.
  • Charge the thermostat for 2-3 hours.
  • Place the display on the base.
  • Do it firmly, till you hear a clicking sound.
  • Look for the power reading from the nest app.
  • Start the Google Nest App. Then go to Setting>Technical Info>Power
  • Your thermostat will work smoothly if the charge is full.

Nest Thermostat Blinking a Mix Of Green And Yellow Lights

You can also get the combination of yellow and green lights on your thermostat, instead of the previous mix. For that, here are the steps to fix it.


  • Remove the display and fully charge it.
  • The time your thermostat takes depends on the battery status.
  • Once it is fully charged, place the display again on the base.
  • Just put the display perfectly over the base.

Nest Thermostat Low Battery Fix

Wrapping it Up

So, till now you’ve only faced issues regarding the different lights blinking on your Nest Thermostat. Whether it is green, red, orange, blue, white, yellow, no light, or combinations of lights.

But with this guide, you’ve got the solution to fix each of them. Follow the steps carefully and don’t worry while fixing your nest thermostat.

If your thermostat still blinks after trying out every step, I would suggest you go for expert assistance. I hope this article was beneficial for you and helped you fix those annoying lights!



I spend each darn end of the week taking a shot at home tasks and trimming down the “nectar do” list. This is where I share the majority of the undertakings I’ve done and things I’m learning.

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