Microwave displays SE or "SENSOR" error during sensor cook or reheat cycles; cooking stops.

Safety: Unplug the microwave before internal cleaning near the sensor.

Cleaning and inspection:

• Locate the humidity/steam sensor inside the cavity (often behind a small grill or opening on the top or side wall).
• Clean the area around the sensor opening with a mild detergent solution and a soft cloth. Remove grease, food splatter, and residue that may block steam from reaching the sensor.
• Ensure the cavity is dry before testing again.

Usage test:

• Plug the microwave back in and try a standard timed cook (not sensor mode). If timed cook works but sensor modes fail with SE, the sensor or its circuit is likely faulty.

Sensor replacement (qualified DIYers):

• Remove the outer cabinet to access the humidity sensor and its wiring harness.
• Inspect for loose connections or damaged wires.
• Replace the humidity sensor with a Hamilton Beach-compatible part if contamination cleaning does not resolve the error.
• If a new sensor does not fix the issue, the control board sensor circuit may be defective and the board should be replaced.