F3
Gree
Outdoor Coil Temperature Sensor Fault
Display shows F3; often associated with outdoor coil temperature sensor issues; unit may not defrost correctly in heating mode.
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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
Open or shorted outdoor coil sensor (NTC), Sensor detached from outdoor coil, Damaged sensor cable, Faulty outdoor PCB sensor input
How to Fix / Troubleshooting
Safety first: Turn OFF power at the outdoor disconnect or breaker before opening the outdoor unit.
- Step 1 – Locate outdoor coil sensor: Remove the outdoor unit top or side panel as per Gree service instructions. The coil sensor is usually clipped to the condenser coil tubing.
- Step 2 – Check attachment: Ensure the sensor is firmly clipped to the coil and has good thermal contact. Reattach if loose.
- Step 3 – Inspect wiring: Follow the sensor wires back to the outdoor PCB. Check for cuts, rodent damage, or loose connectors.
- Step 4 – Replace sensor if needed: If the sensor is cracked or corroded, replace it with a Gree‑specified outdoor coil sensor.
- Step 5 – Test and monitor: Restore power and test in HEAT mode. If F3 persists, the outdoor PCB may be faulty and require professional replacement.
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Repair Difficulty
Hard
4/5
Required Part
Outdoor Coil Temperature Sensor
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