Microwave displays E1 and will not start cooking.
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 remove the outer cabinet.
What you can try:
- Power reset: Disconnect power for 10–15 minutes, then reconnect and test a non-sensor mode (TIME COOK). If TIME COOK works but SENSOR COOK shows E1, the humidity sensor circuit is likely open.
- Avoid sensor modes: Until repaired, use only manual time and power level settings to avoid repeated error beeping.
Repair info: The humidity sensor is usually mounted inside the cavity area behind a small grill. A technician will access it, check continuity, inspect the harness, and replace the sensor or main PCB as needed. Because this requires cabinet removal and high-voltage safety procedures, professional service is strongly recommended.
Repair Difficulty
Required Part
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