Maytag · Microwave Moderate

F4E1 — Cavity Temperature Thermistor Fault

Maytag lists F4E1 on over-the-range microwaves as a possible problem with the cavity temperature thermistor or its wiring.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
producthelp.maytag.com ↗ Maytag Product Help: F4E1 - Error Code - Over-the-Range Microwave

How to fix it

  1. Reset power: turn off the circuit breaker(s) for one minute, turn them back on, and watch the microwave for one minute to see whether the code returns.
  2. If F4E1 returns, schedule service. Do not open the microwave cabinet or test parts inside it: it holds a high-voltage capacitor that can stay charged after unplugging.

Why it happens

Typical signs: F4E1 at startup · Sensor cycles unavailable · Display flashes the error

  • Shorted thermistor Sensor element internally shorted.
  • Pinched/chafed sensor wire Wire insulation rubbed through to chassis.
  • Moisture in connector Water or grease in connector creating short.
  • Failed control board Sensor input circuit shorted on the ACU.

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 Common replacement
    Amazon →

More Maytag microwave codes

door 'Door' / 'Open Door' — Closed Too Long Without Starting F1E1 F1E1 — Main Control Board Failure F1E2 F1E2 — Control / User-Interface Fault F2E1 F2E1 — Stuck Key on Keypad PF PF — Power Failure SE SE — Stuck Key / Sensor Error

All Maytag codes → All microwave codes →

Frequently asked questions

What does the F4E1 code mean on a Maytag microwave?

Maytag lists F4E1 on over-the-range microwaves as a possible problem with the cavity temperature thermistor or its wiring.

What causes the F4E1 code on a Maytag microwave?

Shorted thermistor: Sensor element internally shorted. Pinched/chafed sensor wire: Wire insulation rubbed through to chassis. Moisture in connector: Water or grease in connector creating short.

Is it safe to keep using a Maytag microwave with a F4E1 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix F4E1 on a Maytag microwave?

Reset power: turn off the circuit breaker(s) for one minute, turn them back on, and watch the microwave for one minute to see whether the code returns. If F4E1 returns, schedule service. Do not open the microwave cabinet or test parts inside it: it holds a high-voltage capacitor that can stay charged after unplugging.

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: producthelp.maytag.com.