F4
Day & Night
Outdoor Fan Motor or Fan Feedback Fault
F4 error, outdoor fan may not run or runs erratically, unit overheats
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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
Failed outdoor fan motor, Faulty fan capacitor (PSC motors), Obstructed fan blade, Faulty fan speed control circuit on outdoor PCB
How to Fix / Troubleshooting
Safety first: Turn OFF power at the outdoor disconnect. Do not attempt to spin the fan with power applied.
- Step 1 – Check for obstructions: Look through the top grille for sticks, leaves, or objects blocking the fan blade. Remove any debris.
- Step 2 – Spin test: With power OFF, gently spin the fan blade by hand. It should rotate freely. If stiff or grinding, the motor bearings may be failing.
- Step 3 – Inspect capacitor: Open the service panel and locate the fan capacitor (often part of a dual run capacitor). Look for bulging or leaks. Replace if suspect.
- Step 4 – Wiring check: Confirm all fan motor wires are secure at the capacitor and control board.
- Professional repair: If the motor does not run after capacitor replacement, the fan motor or control board may need replacement by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Outdoor Fan Motor
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