Microwave displays E1 and may not start or may shut down quickly.

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

Failed humidity or temperature sensor, Loose sensor harness, Control board input circuit failure, Corrupted sensor calibration

Safety First: Disconnect power before removing covers.

Reset unit: Unplug for 10 minutes and retry. Sometimes E1 is a transient sensor read error.
Clean interior: Wipe down the cavity and sensor area to remove grease and moisture that can affect sensor readings.
Inspect sensor wiring: Locate the sensor (humidity or temp) and check that its connector is firmly seated on both ends.
Replace sensor: If E1 persists, replace the suspect sensor assembly. If the error remains after sensor replacement, the main control board may need to be replaced.

Hard 4/5

Humidity Sensor or Cavity Thermistor

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