H0
Payne
Defrost Control Fault (Heat Pump Models)
Payne heat pump system (AC mode) shows H0 or similar; outdoor unit may not run in defrost or may behave oddly.
Advertisements
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.
Advertisements
Possible Causes
Failed defrost sensor on outdoor coil, Defrost control board malfunction, Wiring issue between sensor and board
How to Fix / Troubleshooting
Safety: Shut off power to the outdoor unit before opening the control panel.
- 1. Identify if you have a heat pump: Payne heat pumps can heat and cool; if your outdoor unit is AC-only, this code may not apply.
- 2. Inspect defrost sensor: The sensor is usually clipped to the outdoor coil tubing. Check that it is firmly attached and that its wires are not damaged.
- 3. Check board connections: On the defrost/control board, ensure the sensor plug is fully seated and free of corrosion.
- 4. Power reset: Restore power and monitor operation. If H0 returns, the sensor or defrost board may be faulty.
- 5. Technician service: A professional can ohm-test the sensor and verify defrost timing and operation, replacing the sensor or board as needed.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Defrost Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements