Troubleshoot when heating and cooling won't turn off

If your system continues to run, even if the Home app says the system is off, your reverse valve activation is likely set to seasonal instead of cyclical. Activating seasonally causes less wear on the equipment, but some heat pumps require cyclical activation. To change this setting:

1.  Open the Home app .
2. Tap your thermostat.
3. At the top right, tap Settings .
4. Select Thermostat.
5. Select Heat pump.
6. Change the activation to Cyclical.
7. To make sure that the issue is resolved, test your heating and cooling again.

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

1.   On your thermostat, go to Settings .
2. Select Equipment.
3. Select Continue Continue.
4. Select Pro setup Continue. You may see other questions based on your system. Continue through the flow until the screen displays a wiring diagram.
5. Select the Heat pump terminal.
6. Change the Activate setting to Each cycle.
7. To make sure that the issue is resolved, test your heating and cooling again.

Note: If the reverse is true and your heat pump is set to cyclical/each cycle when it should be set to seasonal, you might:

• Hear a loud whooshing sound at the end of the heating or cooling cycle
• Feel a brief burst of cold air at the end of a heating cycle
• Feel a brief burst of hot air at the end of a cooling cycle
• If you experience any of these issues, use the instructions above to set your heat pump to Seasonal or Seasonally and see if it resolves the issue.