Microwave displays E1 and will not start; often associated with sensor cooking functions.

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

Disconnected humidity sensor, Open sensor wiring harness, Failed humidity sensor, Control board sensor circuit fault

Safety first: Unplug the microwave before removing the cabinet.

Reset: Unplug for 10 minutes, then reconnect and test. If E1 returns, inspect the sensor.
Locate humidity sensor: Typically mounted on the top or side of the cavity behind a small grille.
Check connections: Ensure the sensor connector is fully seated and wiring is intact.
Replace sensor: If wiring is good but E1 persists, replace the humidity/sensor cook sensor.
Control board: If a new sensor does not clear E1, the main control board may need replacement.

Hard 4/5

Humidity / Sensor Cook Sensor

Check Price on Amazon

We may earn a commission from links on this page.