F5
Proline
Power Relay or Control Board Fault
Microwave intermittently shuts off and displays F5; may reset after unplugging.
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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
Sticking power relay on control PCB, Cold solder joints on relay, Overheated control board, Internal PCB track damage
How to Fix / Troubleshooting
Safety first: Unplug the microwave.
User-level steps:
- Allow the unit to cool and then plug back in to see if the error clears.
- If F5 recurs frequently, internal control components are failing.
Next steps:
- The main control PCB will likely need replacement. This should be done by a qualified technician.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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