Thermostat issues

[Therednonly]

I’m replacing a nest with a nest  I wired the new one the same as the old one but now the ac turns on in heat and the heat turns on for ac 

[sporfrog]

Feel free to send images of the old wiring and the new to have another pair of eyes verify. On the surface it sounds like W1 and Y1 could be reversed. Also double check on the thermostat to make sure fuel source and system type are matching your HVAC system.

[Patrick_Caezza]

Give this a try.

If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when its in Cool mode), change the settings for orientation of your heat pump.

The instructions depend on which thermostat you have. 

Select the thermostat you have:

Nest Thermostat 

1. Reset your thermostat. Go to Settings > Factory Reset. 
2. Begin thermostat setup with the Google Home app again. On the main screen, tap + > Set up a Nest product.
3. Re-enter all the wires connected to your thermostat. Double check that you account for any unconfigured wires.

Nest Learning Thermostat and Thermostat E

1.  On your thermostat, go to Settings.
2. Select Equipment.
3. Select Continue > Continue.
4. Select Heat Pump.
5. The Nest Thermostat defaults to an O setting for heat
   pumps. 
   • If the O option is highlighted, select B.
   • If the B option is highlighted, select O.
6. Test your heating and cooling again to make sure the issue is resolved.

[Ryan_G]

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