Maytag · Microwave Serious
F3E1 — Humidity Sensor Failure
The control has detected an open or out-of-range humidity (steam) sensor used for Sensor Cook cycles.
- Keep using it?
- Limited use only
- DIY difficulty
- Moderate
- Verified against
- maytag.com ↗
How to fix it
- Unplug the microwave for 5 minutes.
- Use timed cook to verify the magnetron still functions normally.
- Access the humidity sensor (typically inside the cavity vent area).
- Clean any grease or buildup off the sensor and surrounding vents.
- Reseat the sensor's electrical connector at the control board.
- Use a multimeter to check sensor resistance against spec in the tech sheet.
- Replace the humidity sensor if out of spec or visibly damaged.
- If sensor tests good, replace the main control board.
Why it happens
Typical signs: F3E1 appears when starting a Sensor Cook cycle · Sensor cooking does not work but timed cooking still functions · Cycle aborts mid-way
- Failed humidity sensor Sensor element open, shorted, or contaminated with grease.
- Loose sensor wiring Connector to humidity sensor unseated or corroded.
- Blocked sensor vents Grease buildup on sensor screen prevents steam detection.
- Control board fault ACU input circuit for sensor has failed.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
- Maytag microwave humidity sensor Common replacementAmazon →
More Maytag microwave codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: maytag.com.