F4E1 Moderate Moderate DIY

Maytag Microwave F4E1 — Shorted Sensor

Maytag Microwave · Error code F4E1

What F4E1 Means

A sensor input (typically the humidity or temperature thermistor) is reading shorted-circuit.

Symptoms

  • F4E1 at startup
  • Sensor cycles unavailable
  • Display flashes the error

Common Causes

1
Shorted thermistor

Sensor element internally shorted.

2
Pinched/chafed sensor wire

Wire insulation rubbed through to chassis.

3
Moisture in connector

Water or grease in connector creating short.

4
Failed control board

Sensor input circuit shorted on the ACU.

How to Fix It

  1. Unplug the microwave for 5 minutes.
  2. Access the sensor location and inspect wiring for pinches or burns.
  3. Disconnect the sensor and measure resistance — a near-zero reading confirms a short.
  4. Replace the sensor if shorted.
  5. If sensor reads normally when disconnected, inspect the harness for damage.
  6. Replace the harness or main control board as needed.

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.

Common replacement Maytag microwave sensor View on Amazon→

More Maytag Microwave Codes

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

All Maytag codes → All microwave codes →

Verified against manufacturer documentation: maytag.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.