SMEG
Outdoor Unit Not Responding / Control or Power Fault
Unit powers on but compressor and outdoor fan never start; only indoor fan runs
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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
No power supply to outdoor unit, Faulty interconnecting cable, Blown outdoor PCB fuse, Failed outdoor main PCB
How to Fix / Troubleshooting
Safety first: Isolate power before opening the outdoor unit.
- Check outdoor isolator: Ensure the external disconnect switch near the outdoor unit is ON.
- Verify voltage at outdoor terminals: A qualified person should measure mains voltage at the outdoor unit.
- Inspect interconnecting cable: Confirm that the cable between indoor and outdoor units is intact and correctly wired.
- Check outdoor PCB fuse: Replace a blown fuse only with the same rating; if it blows again, there is likely a short in the PCB or compressor circuit.
If the outdoor unit still does not start, the outdoor PCB or compressor may be faulty and requires professional diagnosis.
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Repair Difficulty
Hard
4/5
Required Part
Outdoor Main Control PCB
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