GE Microwave Error Code SE — Humidity Sensor Circuit Fault
What this means
The SE error code on GE microwaves indicates the humidity sensor circuit has malfunctioned. The humidity sensor detects steam from food to automatically determine cooking and reheating times in sensor cook programs. A failed sensor means automatic programs won't work correctly, though manual time/power cooking should still function normally.
Step-by-step fix
3 stepsClean the microwave cavity ceiling
The humidity sensor is typically located on the ceiling of the microwave cavity, often behind a small mica cover. Wipe the entire interior ceiling with a damp cloth and mild detergent to remove food splatter, grease, and residue that can interfere with sensor readings.
The mica cover (thin gray/brown sheet on the ceiling) protects the sensor — do not remove it, but clean its surface gently.
Reset the microwave
Unplug for 5 minutes, then plug back in. If grease was blocking the sensor, cleaning plus resetting should restore normal operation. Test with a sensor cook program (like Sensor Reheat on a plate of food).
Use a covered container when microwaving to reduce splatter that coats the ceiling and sensor area.
Check the mica cover
If the mica cover on the ceiling is cracked, warped, or heavily stained, it should be replaced. A damaged mica cover can allow moisture and grease to reach the sensor directly, causing erratic readings.
Mica covers are inexpensive and easy to replace — they typically just clip or screw in place.
When to call a professional
If cleaning doesn't resolve the error, the humidity sensor itself or its connection to the control board may be faulty. Internal sensor replacement requires working near high-voltage microwave components — professional service is recommended.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Humidity Sensor
Part #WB27X10928 · $15–$35
Required if sensor is confirmed faulty after cleaning
Mica Waveguide Cover
Part #WB06X10705 · $5–$12
Recommended if mica cover is damaged or heavily stained
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