How long does battery last in Nest thermostat?

Asked By: Sharay Fudio | Last Updated: 1st April, 2020
Category: home and garden smart home
4.2/5 (8,465 Views . 9 Votes)
Best answer: The Nest Protect's battery will last five years for the battery-powered version, or long enough as a backup if you use the wired model.

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Keeping this in consideration, how long does the Nest Thermostat last?

Google Nest Learning thermostat has 2 years of warranty. And Nest thermostat E has one. But if you purchase a Nest Thermostat and installation from a Nest Pro, you'll be able to get an Extended Pro Warranty.

One may also ask, why does my Nest thermostat say low battery? If your thermostat's battery level is low, it will disconnect from Wi-Fi. This is to conserve power so it can continue controlling your system. To check your battery level, press the thermostat ring to bring up the Quick View menu Settings Technical Info Power. Look for the number labeled Battery.

Simply so, how do you replace the battery in a Nest thermostat?

  1. Step 1 Removal from Wall.
  2. Step 2 Open Display.
  3. Step 3 Remove the back of the display.
  4. Step 4 Disconnect the base connection ribbon cable.
  5. Step 5 Lift battery from the base.
  6. Step 6 Disconnect the battery from the motherboard.
  7. Step 7 Remove battery from the display.

Do I need to charge my Nest thermostat before installing?

The Nest thermostat keeps its internal battery charged using your heating and cooling system wires, but if there's a problem the battery may drain. Usually your thermostat will take about half an hour to recharge. But if the battery is fully drained it can take as long as two hours to recharge.

27 Related Question Answers Found

Does Nest thermostat work if WiFi goes out?

Yes, if the Nest goes offline, it will continue to function as usual. You will not be able to adjust settings with your phone or computer, but adjustments can be made manually on the Nest itself. When you say the NEST occasionally cannot be reached by WiFi, that's another matter.

What does a blinking green light on my Nest thermostat mean?

A blinking green light near the top of your Nest thermostat's display means that it's updating the software, starting up or restarting. Typically, this will only last a minute or two. Once your thermostat has finished starting up, it will turn on so you can use it.

Does Nest thermostat have battery backup?

The Nest thermostats come with a battery backup that's primarily for keeping memory saved and preventing the programmed schedule from getting wiped. On emergency conditions, you can make use of the heating/cooling services, but when not needed necessarily you shouldn't drain its stored charge.

How do I check the battery level on my Nest Thermostat?

To check your battery level: press the thermostat ring to bring up the Quick View menu Settings Technical Info Power. Look for the number labeled Battery. Once your battery level gets below 3.6V, your Nest thermostat will disconnect from Wi-Fi. If your battery is low, you may have a wiring issue.

Will a Nest thermostat work with two wires?


Nest thermostats can work with systems that use Service Light (L) wires. While L wires can't be connected to the Nest thermostat, they don't need them. The Nest thermostat and Nest app will show you system status information without connecting L wires.

How is Nest powered?

Without a C-wire, the Nest gets its power from your heating or cooling system… assuming it's running. When it's not running, the Nest still needs to get power. The Nest will “pulse” the heat wire, turning on the furnace to pull a bit of power to keep itself going.

Does Nest thermostat have to be hardwired?

You need to mount the Nest thermostat anywhere that you can hardwire the connections to the boiler.

What kind of battery does Nest thermostat use?

Nest Protect uses Energizer Ultimate Lithium AA (L91) batteries. Nest Protect (Battery) requires 6 AA and Nest Protect (Wired) requires 3 AA as backup batteries.

Why is my nest thermostat shutting down?

One possible reason why your thermostat shut down is because the battery drained. Our Nest shuts down after ignoring it for several hours, and when we turn it back on it has a fully charged battery.

Does Nest thermostat need power?


Just so you know, the Nest thermostat requires 12 Volt DC if you are fitting it to the supplied back plate (terminals T1 and T2) You only use/need 5V USB power if you are using the stand.

Why is there no power to my thermostat?

The power is out or a circuit breaker has tripped
The power loss could also be the result of a tripped circuit breaker that powers the air conditioner or heater. Many thermostats run on low voltage sent from the transformer on the HVAC system; if the transformer loses power, so will the thermostat.

How do you take a Nest thermostat off the wall?

Step 1 Remove display from wall
Before disassembling your Nest Thermostat, be sure that your HVAC system is powered off. Grasp the display's metal outer ring with your fingers and pull directly away from the wall, leaving the base behind.

Are Nest thermostats worth it?

The Nest Learning Thermostat's ability to program itself and extensive smart home compatibility make it the best smart thermostat you can currently buy. We think this price is worth the investment, but you can get similar functionality, though fewer HVAC options, with Nest's budget model, the Nest Thermostat E.

Why is my nest blinking red?

A red blinking light means that the Nest's battery is running low. It should turn back on automatically after the battery is charged. Once the Nest is recharged, reconnect the display by pressing it firmly onto the base until you hear it click into place.

Does Nest thermostat need a battery?


The Nest thermostat contains a rechargeable lithium ion battery. This battery runs the programming and keeps the thermostat connected to WiFi, but WiFi connectivity is draining – the battery doesn't last very long on its own. So, to keep itself going, the Nest recharges itself from your HVAC system's wiring.

Why won't My Nest thermostat connect to WiFi?

Check the settings on your Wi-Fi router or access point
Incompatible settings on your home's router or access point can cause your thermostat to be unable to connect to Wi-Fi. For example, high firewall security or parental controls can block your thermostat from connecting to Wi-Fi.

How do I reset my nest?

To manually restart the Nest thermostat:
  1. Press your thermostat ring and hold it down until the screen turns off (about 10 seconds). Then let go of the ring.
  2. Press and release the ring to turn it back on and complete the restart process. You'll see the Nest logo when it begins to start up.