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Stumped on wire compatibility.

Wulfysama
Community Member

I have zero idea what I’m doing. I’m not sure whether to use the top row of labels to look up compatibility or the lower half? (Conventional or the latter?) I ended up trying to put it in and made my best guess, set it to cool and it started to use the heat! I did something so wrong lol. Can someone help me? There’s a video attached of the wires.

from left to right: the ones are W2, G, W, C, Y, and R with a jumper to R2.  

AAA381E2-9392-4DE9-8219-866B6031AF2C.png

5 REPLIES 5

Houptee
Silver Product Expert
Silver Product Expert

Looks like your system is a Heat Pump AC so you need to use the lower markings if that is the case.

The Orange wire is what controls the reversing valve in the system to make it change from heat to ac.

Did you tell the Nest you have a Heat Pump when you set it up and it asked what type of system?


Houptee -- NJ Master HVAC Licensed Contractor

Houptee
Silver Product Expert
Silver Product Expert

Do you have the Nest thermostat (not the learning version) ?

You can go to the Home app and go to settings, scroll to Heat Pump, if O option is highlighted change it to B,  if B is highlighted change it to O.

Try it again to see if the AC and heat work correctly.

If you have the Learning Nest, you do the same changes but you do it on the thermostat display not with the app.

 


Houptee -- NJ Master HVAC Licensed Contractor

MelbaDT
Community Specialist
Community Specialist

Hey folks, 

 

I appreciate your help here, Houptee. 

 

Wulfysama, I'm jumping in to check if you're all good here. Have you had the chance to try the suggestions above?

 

Best, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hey Wulfysama, 

 

Checking back in — how's your thermostat now? Still need our help?

 

Best, 

Melba

MelbaDT
Community Specialist
Community Specialist

Hi, 

 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

 

Best, 

Melba