Nest Learning Thermostat 2Nd Generation Base Motherboard Replacement Repair Guide

Difficulty

Moderate

Steps

7

Time Required

                          25 - 30 minutes            

Sections

1

• Base Motherboard
• 7 steps

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Introduction

What you need

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.

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.

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Step 2

              Disconnect wires               

• Remember to turn off the power to your HVAC system and the thermostat.
• Disconnect all wires from the grey spring-loaded connectors. This can be done using your fingers.

Remember to turn off the power to your HVAC system and the thermostat.

Disconnect all wires from the grey spring-loaded connectors. This can be done using your fingers.

Step 3

              Remove screws from wall               

• Remove the two 40mm screws from the base of the thermostat using a #0 Phillips screw driver.

Remove the two 40mm screws from the base of the thermostat using a #0 Phillips screw driver.

Step 4

              Remove base from trim plate               

• Unsnap the base from the trim plate (if used) using a plastic opening tool.

Unsnap the base from the trim plate (if used) using a plastic opening tool.

Step 5

              Remove screws from back of base               

• Turn the base over.
• Remove the four 6 mm screws from the back of the base using a #0 Phillips screwdriver.

Turn the base over.

Remove the four 6 mm screws from the back of the base using a #0 Phillips screwdriver.

Step 6

              Opening base               

• Pry the base mother board open from the side using a plastic opening tool.

Pry the base mother board open from the side using a plastic opening tool.

Step 7

              Remove base motherboard from base back               

• The base mother board is only held together by light adhesive.
• Pry the baseboard from the bottom using the flat end of a spudger.

The base mother board is only held together by light adhesive.

Pry the baseboard from the bottom using the flat end of a spudger.

To reassemble your device, follow these instructions in reverse order.

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                                                                                      6 other people completed this guide.                                             

Author

                                      with 4 other contributors 

                    Rachael Deptula                     

Member since: 09/03/2014

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                       USF Tampa, Team 11-5, Blackwell Fall 2014                        

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                                            11 Guides authored                     

wesbug - Feb 13, 2016

Reply

Would like to know where I can get just the base motherboard.

brettspradley - Jun 6, 2016

Reply

Where can we purchase replacement parts?

john gemora - Nov 12, 2016

Reply

i want the baseboard.. where i can buy? pls help…

bbolen - Dec 21, 2016

Reply

Yep, my base unit lasted exactly 8 days, then it shorted out. The furnace repairman said he has seen it a couple of times, the base unit can’t handle the current needed by the furnace so it goes poof. Back to Honeywell…

Adrian Ma - Jan 5, 2017

Reply

No replacement parts from Nest, my base unit died and I have perfectly working thermostat but am forced to buy a new one cause I can’t get the base unit on its own.