Microwave shows E8 and stops mid-cycle; may be associated with sensor cooking modes.

Safety first: Unplug the microwave.

Clean sensor area:

• Locate the steam/humidity sensor inside the cavity (often behind a small grill or opening on the upper side wall or ceiling).
• Clean the area around the sensor opening with a mild detergent and a soft cloth. Remove any grease or food splatter.
• Clean the interior cavity thoroughly, including the ceiling and side walls, to ensure accurate steam detection.

Reset and test:

• After cleaning, leave the door open to dry completely.
• Plug the unit back in and test a non-sensor mode (e.g., timed cook). If that works, test a sensor mode. If E8 only appears in sensor modes, the sensor itself may be faulty.

Replacing the humidity sensor requires removing the outer cover and disconnecting the sensor from the control board. This is a moderate to advanced repair; consider a technician if you are not comfortable with internal access.