Maytag · Microwave Moderate

F8E1 — Sensor Open / Defective

A temperature or moisture sensor input to the control is reading open-circuit or out of expected range.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
maytag.com ↗

How to fix it

  1. Unplug the microwave for 5 minutes.
  2. Access the sensor area (typically in the vent or cavity ceiling).
  3. Inspect and reseat the sensor harness at both the sensor and the control board.
  4. Measure thermistor resistance with a multimeter at room temperature; compare to tech sheet.
  5. Replace the sensor if reading is open or far out of spec.
  6. If sensor checks good, replace the main control board.

Why it happens

Typical signs: F8E1 appears at startup or during sensor cycles · Sensor cooking unavailable · Cycle aborts

  • Open temperature sensor (thermistor) Thermistor wire broken or sensor element failed.
  • Disconnected sensor harness Connector at sensor or control board unseated.
  • Damaged sensor cable Wire chafed or cut from heat or grease exposure.
  • Failed control board Sensor input circuit on the ACU 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 sensor (thermistor/humidity) Common replacement
    Amazon →

More Maytag microwave codes

door 'door' — Door Not Closed / Open Reminder F1E1 F1E1 — Main Control Board Failure F1E2 F1E2 — Control / User-Interface Fault F2E1 F2E1 — Stuck Key on Keypad F2E2 F2E2 — User Interface Mismatch F3E1 F3E1 — Humidity Sensor Failure

All Maytag codes → All 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.