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Wire hook up

Jumper
Community Member

I have written down my old wires and where they are hooked up. I cannot find any article that asks what color wires you have and where to hook up the wires to the new nest thermostat.

13 REPLIES 13

laurentbourg
Silver Product Expert
Silver Product Expert

Watch the following on youtube and you will get all the info you will  need. 
https://youtu.be/CCNIko3iZIE

 

It helped with learning which wires and what they are used for. I have 5 wires. 1.white wire connected to aux. Yellow hooked to y. Green hooked to g. Blue hooked to o. Red hooked to r. Now where does the blue wire go on the nest thermostat? Also does the white wire go on the w on the nest thermostat? Thanks for your help and if you or someone could answer the 2 questions. Again thanks.

laurentbourg
Silver Product Expert
Silver Product Expert

If after watching that you can’t figure it out, just drop me a line describing where each wire is connected on your current thermostat and I will provide you with the mappings. 

laurentbourg
Silver Product Expert
Silver Product Expert

Ok cool, you have a heat pump setup. Do the following:

white to W2 Aux

yellow to Y1

green to G

blue to OB

red to either Rc or Rh, it does not matter. 

 

Okay I tried hooking it up like this. I hooked the white to w. Yellow to y. Green to g. Blue to OB. Red to r. The heat pump came on outside, but the inside unit did not come on. By the way I live in a trailor and I live in Georgia if that helps. When the Honeywell thermostat was hooked up the inside and outside units both worked when the heat or cool air was on. I am not sure if it was right but it was like that when I bought the trailor brand new. Thanks for your help. If I can’t get this right I might have to call a pro. Thanks again for your help

laurentbourg
Silver Product Expert
Silver Product Expert

This might be a heat pump balance setting. Check in the your nest thermostat setting. 

more information here https://www.alphr.com/nest-thermostate-keeps-using-aux-heat/

Jumper
Community Member

This won’t work. Don’t have a heat pump setting on the thermostat. Thanks anyways. Guess I will hire a pro.

Jumper
Community Member

Do you have any additional information?

laurentbourg
Silver Product Expert
Silver Product Expert

What is your exact Nest model, is it the Nest 2020, the one with the mirrored faceplate?

It is just a plain nest thermostat. It is pinkish color.

laurentbourg
Silver Product Expert
Silver Product Expert

Ok thanks for confirming. Could you please take a pic of the wire plate and upload to this thread?

Thanks for all your help. I had to have a professional hook it up because it was driving me crazy. Thanks anyways.

laurentbourg
Silver Product Expert
Silver Product Expert

Ok great it all worked out.