E10
OK
Stuck Relay or Control Output Fault
Microwave shows E10 and beeps; the interior light may stay on even with the door closed.
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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
Stuck power relay on control PCB, Shorted triac or transistor output, Control PCB logic failure, Shorted load causing relay contacts to weld.
How to Fix / Troubleshooting
Safety: Unplug the microwave immediately if any component (light, fan, or turntable) runs continuously or if you smell burning.
- 1. Power Reset: Leave the unit unplugged for 10 minutes, then reconnect. If E10 returns or a component runs without a command, the control board is suspect.
- 2. Visual Inspection of Control PCB: Remove the control panel and inspect the board for burnt spots near the relays or power components.
- 3. Check for Welded Relay Contacts: If a relay appears discolored or cracked, it may be stuck closed. Replacement of the relay or the entire control board is required.
- 4. Inspect Connected Loads: A shorted lamp socket or fan motor can overload the relay. Check these components for obvious shorts or damage.
- 5. Recommended Repair: For most microwave models, the control PCB is replaced as a complete unit rather than repairing individual relays.
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Repair Difficulty
Hard
4/5
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