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Nest Thermostat on Heat Pump

ronrutmr2
Community Member

I have a Carrier heat pump with electric auxiliary strip heat. Installed a Nest gen. 3 thermostat today. Once the battery charged up and set-up was done, the following happened:

1.  When I set it for A/C, the compressor ran off and on, and the fan did not come on.

2.  When I set it for heat, the fan ran off and on, but the compressor did not run.

3.  When I set it high enough to call for auxiliary heat, the heating elements heated but the fan still ran off and on.

Since the house was beginning to warm up (live near Gulf coast), I put the old thermostat back on and it's running normally.

WIres are: Y1, G, W1, W2, C, and RH. There is no wire to the O/B slot, Carrier defaults to O.

Another annoyance is when the thermostat is mounted onto the base, it doesn't always "click" on properly. Then the push to enter function is sticky and it causes random reboots. Once that is corrected, operation is smooth.

Any thoughts on this? 

Update 11/4/22: Charged thermostat all night through USB port, reinstalled, did a reset (off/on only). Screen displayed that a wiring change was detected. Now fan runs properly, auxiliary heats works, but on call for either heat or cool, compressor does not kick on.

5 REPLIES 5

Jhonleanmel
Community Specialist
Community Specialist

Hi ronrutmr2,

 

Thanks for reaching out and sorry for the delay. I'd love to know more about this. Could you share a photo of your current thermostat's wiring? 

 

Thanks,
Mel

I finally returned the thermostat after I had to have a service call due to a blown blade fuse. The service tech could not get it to work, either.

EdwardT
Community Specialist
Community Specialist

Hi ronrutmr2,

 

Thanks for the update. We're sad to see you go. We hope we can make it up to you in the future. Let me know if there's anything else.

 

Thanks,

Edward

Jhonleanmel
Community Specialist
Community Specialist

Hi folks,

Chiming in to see if you still need assistance with this. Let us know if you have additional questions ― we'd love to help.

Best,
Mel

Hi everyone,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

Thanks,
Mel