Microwave displays F5 and may not start or may shut down unexpectedly.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the microwave. Do not attempt to power it with covers removed. High-voltage components can be lethal.
- Power cycle: Unplug for 10 minutes, then plug back in. If F5 reappears immediately, suspect the control board.
- Inspect control board: Remove the control panel and access the electronic control board. Look for burnt spots, cracked solder joints, or a melted relay.
- Check for overheating signs: Darkened areas or a burnt smell around the relay area indicate board damage.
- Replace control board: If visible damage is present or F5 persists, replace the main control board with the correct Kenmore part number.
Component-level repair of the control board (e.g., replacing individual relays) should only be done by qualified electronics technicians. Most homeowners should replace the entire board.
Repair Difficulty
Required Part
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