F2
SMEG
Outdoor Ambient Temperature Sensor Fault
F2 code; outdoor unit may not start or may shut down quickly
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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 ambient NTC sensor, Sensor cable damaged by weather or rodents, Loose connector on outdoor PCB, Water ingress into sensor housing
How to Fix / Troubleshooting
Safety first: Turn off the outdoor isolator before opening the unit.
- Locate sensor: The outdoor ambient sensor is usually fixed near the air intake grille of the outdoor unit.
- Check physical condition: Inspect for cracks, corrosion, or chewed wires.
- Verify connection: Ensure the sensor plug is secure on the outdoor PCB.
- Replace sensor: If damaged or if F2 persists, replace with a compatible SMEG outdoor ambient sensor.
Ensure the new sensor is mounted in free air, away from direct sunlight or hot discharge air.
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Repair Difficulty
Medium
3/5
Required Part
Outdoor Ambient Temperature Sensor (NTC)
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