Hi there!
Thank you for bringing your concern to us.
It's unusual for a heat pump fan to continue running after the thermostat is turned off. To effectively troubleshoot this issue, We'll need some additional information:
- Make and model of your new HVAC system: This will help identify potential compatibility issues or specific troubleshooting steps.
- How did you wire your new Nest Thermostat? Incorrect wiring can cause unexpected behavior. A clear picture of the wiring setup would be helpful.
- How was your original thermostat wired? Comparing the wiring configurations can reveal any discrepancies.
Potential Causes
While we gather more details, here are some common possibilities:
- Relay Issues:
- A malfunctioning relay in the heat pump system might be preventing the fan from turning off. This typically requires a professional HVAC technician to diagnose and repair.
- Wiring Problems:
- Incorrect or loose wiring between the thermostat and the heat pump can cause various issues. Carefully inspect the wiring for any damage or improper connections.
- System Compatibility:
- In rare cases, compatibility issues between the Nest thermostat and the heat pump can occur. Providing the make and model of your HVAC system and wiring will help determine if this is a factor.
Once we have more information, I can provide more specific guidance. If you're unable to resolve the issue independently, contacting a qualified HVAC technician is recommended.
Best,
Brandon.
