Whirlpool Microwave Error Code SE — Humidity Sensor Error
What this means
The SE error code on Whirlpool microwaves indicates the humidity sensor has failed or is reading incorrect values. The humidity sensor is used by automatic cooking and reheating programs to detect steam levels and determine when food is done. When this sensor fails, automatic programs won't function properly, though manual time/power cooking may still work.
Step-by-step fix
3 stepsClean the humidity sensor
The humidity sensor is usually located on the ceiling of the microwave cavity, covered by a small mica sheet or plastic cover. Wipe the interior ceiling of the microwave with a damp cloth to remove food splatter and grease that can affect sensor readings.
Built-up food residue on the cavity ceiling is the most common cause of humidity sensor errors — regular cleaning prevents this.
Reset the microwave
Unplug the microwave for 5 minutes and plug it back in. If grease was blocking the sensor and you've cleaned it, the reset should allow normal operation.
After resetting, test by using a sensor cook or auto-reheat program to see if it works correctly.
Check the sensor and wiring
If cleaning doesn't help, unplug the microwave and access the sensor from behind the top panel. Check the sensor wires for damage or loose connections at the control board. Test the sensor with a multimeter per your model's specifications.
SAFETY WARNING: Do not touch the high-voltage capacitor inside the microwave. If you're not experienced with microwave internals, call a professional.
When to call a professional
If cleaning the sensor area and resetting doesn't work, the sensor itself or the control board may need replacement. Due to the high-voltage components inside microwaves, professional repair 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.
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