Nest Learning Thermostat 2nd Generation LCD Screen Replacement

Written By: Justin Curry
  • Comments: 18
Nest Learning Thermostat 2nd Generation LCD Screen Replacement

Difficulty

Moderate

Steps

19

Time Required

30 - 40 minutes

Introduction

The replacement of the LCD screen is not difficult. The tools need to replace it are the plastic opening tools.

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    • Grasp the display's metal outer ring with your fingers and pull directly away from the wall.

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    • Turn the display over.

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

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    • Pinch the gray 20-pin connector with your fingers and pull directly away from the display.

    • Do NOT pull too far as there is a ribbon on the back panel connecting the 20-pin connector to the display.

    I pinched the connector and it will not pull out

    Robert Zelak -

    I’m my case, the white backplate cannot be pulled until it is turned about 1cm counterclockwise to disengage the brackets that hold to the internal plate. To do this, yo need to hold the front of the Nest with the metal frame (so the it doesn’t turn), while turning the backplate.

    Alberto Lazaro -

    And in my case, there are only 2 screws (in the 9 and 3 o’clock positions) and not 4 as shown in the photo.

    Alberto Lazaro -

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    • Locate the blue pull tab at the end of the ribbon which says, "1. Pull".

    • Grasp the tab with your fingers and pull directly away from the motherboard.

    How do you reattached the ribbon back to the motherboard ??

    alexehler -

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    • Locate the blue tab which says, "2. Pull".

    • Use tweezers to pull the battery up and away from the display.

    • Do NOT pull too far, as the battery is still connected to the motherboard and must be unplugged.

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    • Locate the blue tab which says "3 unplug".

    • Grasp the battery with your fingers. Pull gently directly away from the display to unplug the battery from the motherboard.

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    • Grasp the battery with your fingers and pull directly away from motherboard to separate the battery from the display.

    Where do you buy the battery?

    Robert -

    Same question

    Milutin Jokic -

    At least say the tipe of battery that's needed.

    Pedro Sanchez -

    I just ordered the battery model specified. When it arrived, I realized it doesn’t have the same specs as the battery that comes with the thermostat.

    The part listed (TL284443) is 3.7 VDC, but it is only is 380mAh (1.41 Wh) (if you zoom in on the image when you click “Buy”, you can see)

    You can clearly see in the tear-down that the battery that comes with the thermostat is 2.1 Wh.

    It might work as a replacement, but doesn’t have the same capacity.

    Gerry Beggs -

    Double check your own equip online or in the manual people.

    There are different generations of thermostats. How would this guy know which battery you need.

    Thanks for the directions.

    Helps a lot.

    LisaKK -

    To be fair, most people don’t know that there are different generations of the Nest Thermostat and clearly they didn’t read that this was for the 2nd generation Nest Thermostat. Probably should have been pointed out in the instructions more clearly for those folks. Then they wouldn’t have been so confused about the battery voltage differences.

    Resist -

    I am a 64 year old woman, I had the Nest next generation installed last year. So far it keeps telling me that the connection to my wi-Fi is not working and now it’s saying the battery is dead. I’ve gone through all the steps to re-connect to wi-fi to no avail. Could this be because the battery needs replacing?

    It’s 68 degrees in my house now and that’s thanks to my fireplace not this horrible device. I am going back to the regular thermostat, what a waste of hard earned money.

    Laura Rogers -

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    • Locate the auto-away sensor.

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    • Remove the four 3mm screws with a #0 Phillips screwdriver.

    • Remove the one 4mm screw located at the edge of the auto-away sensor. Use a #0 Phillips screwdriver.

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    • Lift the auto-away sensor from motherboard using tweezers.

    • Peel the copper foil gently from the EMI shield.

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    • Remove one 4 mm screw from the motherboard using a #0 Phillips screwdriver.

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    • Remove the EMI shield from the motherboard using the plastic opening tools.

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    • Unsnap the LCD ribbon from the motherboard gently using the tweezers.

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    • Locate the black tabs that hold the display to the motherboard.

    • Push the black tabs gently away from the motherboard using the plastic opening tools.

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    • Pull the face display gently away from the motherboard.

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    • The front of the glass display and plastic frame is held together by only light adhesive.

    • Push the crescent shape bottom of the display away from the plastic frame using the plastic opening tools.

    What is that crescent plastic part for?

    My gen 3 seems to be bubbling and not flat

    Chris Chung -

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    • Pry the front glass and plastic frame apart gently using the plastic opening tools.

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    • Pry the LCD screen gently from the plastic frame using the plastic opening tools.

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    • Pull the LCD screen away from the plastic frame gently using your fingers.

    I can’t see how the LCD ribbon is reattached. Is it sliding just under the part that is pivoting up or is it beneath the wires below that?

    lessig -

Conclusion

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

Author

Justin Curry

Member since: 23/09/14

264 Reputation

5 comments

Please could you say the type of LCD screen? Or present detailed photo of rear side?

vladvys -

Yes, this is a guide for replacing the LCD. I'd like to know what LCD to order. Thanks.

kylegoetz -

Thank you for providing this tutorial. My dog, not making this up, knocked my nest off the wall. Where can I purchase the replacement green itself and the plastic opening tools you used throughout the repair? This will be my first time on something like this, but with your guide I should have a decent shot at not screwing it up.

erick.starke -

Skip step 12. There is no reason to remove the EMI shield.

richardrobison -

Where can you get the replacement lcd screen for gen 2 nest learning thermostat?

Stan Griff -