York
Heat Pump Heating Performance Issue
York heat pump in heating mode blows cold air or does not heat adequately
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Outdoor unit in defrost or not running, Reversing valve stuck, Low refrigerant charge, Electric heat strips not energizing
How to Fix / Troubleshooting
Safety: Turn off power before opening panels. Refrigerant and high voltage are present.
- Observe outdoor unit: Ensure the York heat pump outdoor unit runs in heating mode. If not, check breakers and thermostat wiring (O/B, Y, etc.).
- Check defrost cycle: Brief cool air during defrost is normal. Persistent cold air is not.
- Verify electric heat: If equipped, confirm auxiliary heat strips energize when outdoor temperature is low. A technician may need to test sequencers and relays.
- Reversing valve: If the unit cools fine but will not heat, the reversing valve or its solenoid may be stuck or failed and should be checked by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Reversing Valve
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