iFixit - Answers With Device "Smart Thermostats"

Nest Learning Thermostat 2nd Generation: Where can I purchase parts for the nest 2nd generation thermostat?

Wed, 07 May 2025 12:28:41 -0700

Does anyone know where can I get the base motherboard for a Nest 2nd generation?

⟐ Commented May 07, 2025 at 12:28 MST

Nest Learning Thermostat 2nd Generation: What if my Wi-Fi network goes offline?

Sat, 25 Nov 2023 15:22:29 -0700

If my Wi-Fi network goes offline, will the thermostat still operate as programmed?

⟐ Answered November 25, 2023 at 15:22 MST

Nest Learning Thermostat 2nd Generation: nest won't connect to the heatlink

Sat, 16 Nov 2024 07:05:27 -0700

Hi Folks, my nest wouldn’t connect to the heatlink. I’d been on to nest support and they said the system needs to be replaced. Apart from checking version numbers there was no “nest magic” suggested by the support rep, over and above what I’d already tried.

⟐ Commented November 16, 2024 at 7:05 MST

Nest Learning Thermostat 2nd Generation: Source for replacement battery for the Nest Thermostat v2.0

Wed, 18 May 2022 00:54:23 -0700

Battery as detailed in this iFixit teardown.

Teardown URL

Picture of battery

⟐ Commented May 18, 2022 at 0:54 MST

Lennox iComfort 10F81 Thermostat: Replacement capacitor for Lennox icomfort 10f81 Thermostat

Tue, 24 Jun 2025 05:19:33 -0700

I am trying to figure out the replacement Capacitors for the 10f81 thermostat. There was guide created for this but the Capacitors shown don't match what I have in my thermostat. Here is the link to the guide...Lennox iComfort 10F81 Thermostat Blank Screen Fix. I am attaching pictures of the Capacitors in my thermostat. The Capacitors in question are the "220 HHB. JD4" and the "E 4DB 47 10V".

Somehow I sent the same image. Here is the second image.

⟐ Commented June 24, 2025 at 5:19 MST

Nest Learning Thermostat 2nd Generation: Where to buy NEST2 Base Plate?

Sun, 16 Aug 2015 06:46:57 -0700

Where can I buy a NEST2 base plate to connect wires?

Nest Learning Thermostat 3rd Generation: Where to find Base Plate?

Mon, 07 Mar 2022 14:07:10 -0700

Does anyone know where I can get just the base plate for the Nest Learning 3rd Generation T-stat?

⟐ Answered March 07, 2022 at 14:07 MST

Nest Learning Thermostat 2nd Generation: Does iFixit carry replacement parts for the Nest thermostat?

Thu, 08 Dec 2016 16:20:10 -0700

Hey everyone,

I see that there are several guides for replacing parts for the Nest Learning Thermostat, and I'm just curious where I can purchase them if something were to go wrong with mine in the future. Thanks in advance!

⟐ Commented December 08, 2016 at 16:20 MST

Nest Learning Thermostat 2nd Generation: up date software what does this mean

Mon, 28 Sep 2015 18:05:08 -0700

up date software what does this mean been like this all day and last night

⟐ Answer accepted September 28, 2015 at 18:05 MST

Nest Learning Thermostat 2nd Generation: Daylight Savings Time adjustment?

Tue, 04 Nov 2014 10:58:21 -0700

I didn't see it listed in the Troubleshooting pages, so how do I adjust the thermostat to account for Daylight Savings Time?

⟐ Commented November 04, 2014 at 10:58 MST

Nest Learning Thermostat 2nd Generation: Nest Gen 2 Battery won't change low lin

Mon, 15 Apr 2024 16:22:43 -0700

I bought a second hand Nest Thermostat and the battery will not charge. The info has a low lin reading of only 8. I know the unit is defective because I bought a brand new one and wired it the same and it works great with a lin reading of 200. Is the defective unit in need of a new battery? Or is it possible there is something wrong with the base?

Thanks!

⟐ Commented April 15, 2024 at 16:22 MST

Nest Learning Thermostat 2nd Generation: Where can I purchase Wire Base For nest 2nd generation thermostat?

Fri, 22 Apr 2022 04:43:51 -0700

Where can I purchase Wire Base For nest 2nd generation thermostat?

⟐ Answered April 22, 2022 at 4:43 MST

Lennox iComfort 10F81 Thermostat: Lennox iComfort 10F81 resistive touch screen replacement

Mon, 04 Nov 2024 17:02:31 -0700

Hello, does anyone know where to get a replacement resistive touch screen for the 10F81? My thermostat was dropped and the screen broke but the stat still functions. Look forward to a response!

⟐ Answered November 04, 2024 at 17:02 MST

Nest Learning Thermostat 3rd Generation: Will Nest 2nd generation battery fit in a Nest 3rd generation

Sun, 11 Feb 2024 02:19:35 -0700

Hi,

Will a 2nd generation nest battery fit into a nest 3rd generation thermostat. Ordered the wrong one by mistake.

Thank You,

Jim

⟐ Answered February 11, 2024 at 2:19 MST

Nest Learning Thermostat 3rd Generation: How to drain battery

Sat, 25 Mar 2023 13:07:33 -0700

The iFixit instructions with the replacement battery says to charge, drain, and charge. Does anyone know how to drain the battery in a consistent way and how long does it take to do so. Obviously, reconnecting the thermostat back to the base won’t work since it can charge from the base.

⟐ Commented March 25, 2023 at 13:07 MST

Nest Learning Thermostat 3rd Generation: Thermostat not calling for heat.

Sat, 29 Jan 2022 22:21:41 -0700

So I decided to buy a used 3rd gen thermostat. I got everything installed. I made sure I hooked everything up correctly as well… When the thermostat is set to heat though it seems like the thermostat doesn’t actually call for heat when in Gas and Forced air modes. I did change the heat source mode to electric and it did turn the blower on ( we have gas so still no heat was made) I also spent time on a support chat with nest for almost an hour trying to troubleshoot with them. Going through resets, updates, double and triple checking wiring to no avail. I’m about to tear the thing apart to see if maybe there is just a loose connection somewhere??

If anyone has any ideas, please feel free to let me know!

⟐ Answer edited January 29, 2022 at 22:21 MST

Nest Learning Thermostat 2nd Generation: Why is the new battery not powering the device?

Tue, 04 May 2021 06:06:15 -0700

I received my new battery for my nest 2nd gen thermostat from I fix it. After I installed it, I charged it with a USB charger. After several hours of charging, the Nest device won’t turn on. When I plug it into the wall, I get a red blinking light at the top. I know I’m installing the battery correctly because, I was able to install the old one and get it to work. Is there a problem with the device or the battery? Thanks!

⟐ Answered May 04, 2021 at 6:06 MST

Nest Learning Thermostat 2nd Generation: I need to replace the outer ring, where can I find that part?

Fri, 11 Dec 2020 16:45:49 -0700

Kids knocked thermostat off the wall and the ring is dented. Now it won’t stay attached very well. I need to replace the ring. Any help here?

⟐ Answer accepted December 11, 2020 at 16:45 MST

Nest Learning Thermostat 2nd Generation: Where do I get parts?

Sun, 24 Sep 2017 07:17:43 -0700

I have a Nest 2nd Generation thermostat that no longer works in heat mode. It thinks it is turning on the furnace, but the signal doesn't reach the furnace. It works fine in cool mode. There are guides to replacing the parts on this site, but no way of diagnosing the correct part to replace or of buying a part or finding where to get parts.

⟐ Answer accepted September 24, 2017 at 7:17 MST

Nest Learning Thermostat 2nd Generation: Why does my T/S read Updating Software for two days now

Sat, 26 Aug 2017 20:21:19 -0700

T/S reads updating software for two days now and keeps the A/C running over time

⟐ Answered August 26, 2017 at 20:21 MST