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Nest has no cool option.

kjacobs0611
Community Member

My cool option on my nest has disappeared. It used to be there and now I only have heat. I have reset the HVAC system, I have checked the wires, and the wiring setup on the app is detecting the wire. How do I get the cool option back?

12 REPLIES 12

Trojan60
Community Member

This just happened to me, what is the fix?

ihatethis
Community Member

This same thing happened to us as well. HVAC person said it is the thermostat, but I find that hard to believe. 

kjacobs0611
Community Member

Update: I put the old thermostat back on and the AC kicked right on. So I agree with your HVAC guy it must be the thermostat. 

EdwardT
Community Specialist
Community Specialist

Hi folks,

 

Thanks for reaching out. I'm sorry to hear that you're having an issue with the cooling feature of your Nest Thermostat. I'd love to know more about this and I have a few questions:

 

  • What type of Nest Thermostat do you have?
  • How is your Nest Thermostat wired?

 

Looking forward to your response.

 

Thanks,

Edward

I don’t know how to find out which one I have. It is not a learning one. I have a photo of the wiring but I can’t figure out how to attach. 

EdwardT
Community Specialist
Community Specialist

Hi folks,

 

Thanks for the response. We could try to swap wires on your Nest Thermostat to isolate the issue further. Could you share a photo of your wiring? 

 

Looking forward to your response.

 

Thanks,

Edward

Ryan_G
Community Specialist
Community Specialist

Hey folks,

 

Thanks for visiting the Google Nest Community. 

 

Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.

 

If you have additional questions, feel free to submit another post and provide as many details as possible so that others can lend a hand. 

 

Hope this helps!

 

Kind regards,

Ryan


 

cmorgan74
Community Member

have the same problem. anyone find the answer?

klook
Community Member

I have the same problem also, I will respond to EdwardT. I have the Nest learning, Gen 3. I have chased my wires back to the unit to confirm what they go to. It works fine with the standard Honeywell I had before and am glad I kept it. It will not flip the reversing valve to the cooling mode. I have gone into the settings repeatedly and changed the O/B orientation 3 times. I have factory reset it twice, going thru the whole setup procedure each time. Seems this is internal to the unit as others seem to be having this issue.

klook
Community Member

In response to EdwardT, I took the Nest off the wall again and put it back in its nice little box. The wires were hooked up per the instructions on one of your sites. All my wires were correct in color, except the Yellow wire, which was Brown but went to the yellow Y wire in the unit. All were hooked to the corresponding wires in the heating and air unit. 

My orange wire, which should operate the reverse switch, was hooked up to the orange in the unit with an O...there was no B. In addition to trying to change things in settings, I put the red wire on the Rh instead of the Rc and it made no difference. I have now installed the old Honeywell twice and it works fine.  I used to do maintenance and perform pm's on rooftop and ground units at a prison, I am familiar with the wiring. If it was a bad wire, my Honeywell would not work either.  It is a defect in the Nest and I will just have to eat it and go buy something else if I want a fancy thermostat. This was a gift and will make a delightful conversation piece in my man room. Or I might sell or give it to someone that has a system that does not need the O/B wire.....hmmmm.

EdwardT
Community Specialist
Community Specialist

Hi klook,

 

Thanks for the added information. Just to clarify since it looks like you have a heat pump system, are you also not seeing the cooling option or is it blowing warm air when you're calling for cooling?

 

Thanks,

Edward

klook
Community Member

I see the cooling option in test mode? It is blowing air up to 100+ degrees when testing cooling mode. I tried heating mode test and it....heated. I used an infrared thermo to check temps.