How to Fix / Troubleshooting

Safety first: Unplug before accessing internal components.

Step 1 – Clean interior: Thoroughly clean the cavity, especially around the sensor vent or grill. Built-up grease can affect sensor readings.
Step 2 – Avoid covering sensor: Ensure cookware or covers are not blocking the sensor area during sensor programs.
Step 3 – Power reset: Unplug for 5 minutes, reconnect, and test a non-sensor manual power/time program. If manual modes work but sensor modes show E3, the sensor or its circuit is suspect.
Step 4 – Replace humidity sensor: Install a new humidity/sensor module compatible with your Bauknecht model.
Step 5 – Control board: If a new sensor does not resolve E3, the control board may require replacement.

Microwave shows E3 and stops heating; may occur during sensor cooking modes.

Possible Causes