Nest Thermostat Heating in Both Modes

[N3stN00b]

Hey all,

Looking for some assistance as to why my nest is blowing heat in both heat mode and cool mode.
The system is a heat pump, and zoned with a honeywell hz322.

I installed nests throughout the house this winter and heat was working without any issues. Now that it is getting warmer, I kicked on the cool mode to find that heat is also coming out from the vents.

To rule out any HVAC unit issues, I temporarily hooked up the original honeywell thermostat... and everything works as it should.

I have tried the following:
- switched O/B wires in the settings as recommended by some posts on here, but it didn't solve my issue
- factory reset and re-setup the unit, also didnt do anything

Photos of the previous wiring and nest wiring can be found here: https://imgur.com/a/G4Gbheq

Any advice would be greatly appreciated. Hopefully its just something silly that I overlooked 🙂

[Monk917]

Same issue. Waiting to hear a response to your question 

[kendrane]

Same issue here too, following for response

[WWalkerDavis]

Same issue of heating in cooling setting.

[N3stN00b]

welp, sure looks like Google nest loves to leave its customers high and dry. I think both my base plates have failed and replacements arent available. Zero support from these Community Experts either.

[aguilarmateo]

Hi folks,

Thanks for posting on the community. Sorry to hear you're having trouble with your Nest thermostat. This article can help: Troubleshoot strange heating or cooling behavior. 

Let me know if you have any questions.

Best regards, 

Chris