Troubleshoot when heating and cooling are reversed

If your system starts to blow cool air when your Nest thermostat is in heat mode, change the settings for orientation of your heat pump. Do the same if it blows warm air when it’s in cool mode.

Nest Learning Thermostat (4th gen) and Nest Thermostat

1. Open the Google Home app .
2. Tap Home   Climate   your thermostat.
3. Tap Settings Thermostat.
4. Scroll until you find Heat pump. This shows which wire configuration is currently selected.
   • If the O option is highlighted, select B.
   • If the B option is highlighted, select O.
5. Test your heating and cooling again to make sure the issue is resolved.

You can indicate which system should go with unspecified wires. Empty terminals will show “-”.

Nest Learning Thermostat (3rd gen or earlier) and Thermostat E

1. On your thermostat, go to Settings .
2. Select Equipment Continue Continue.
3. Select Heat Pump.
4. 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.
5. To make sure the issue is resolved, test your heating and cooling again.