F5
Emerson
Keypad and Control Board Mismatch or Communication Error
Microwave displays F5 and may not respond to some keypad commands.
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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
Incorrect replacement keypad, Loose keypad ribbon cable, Control board firmware mismatch, Failed control PCB
How to Fix / Troubleshooting
Safety first: Unplug the microwave.
Verify parts:
- If the error appeared after replacing the control panel or keypad, confirm that the replacement part number exactly matches the Emerson model.
Check connections:
- Remove the control panel and reseat the keypad ribbon cable.
- Inspect for bent pins or contamination on the connector.
If F5 persists with correct parts and good connections, the control board may need replacement by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Control Panel Assembly
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