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Whirlpool Microwave F4E1 Error Code

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Maya Ortiz Written by Maya Ortiz Appliance Repair Content Specialist Published October 20, 2026

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Code overview at a glance.

The facts for this Whirlpool error, a plain-language snapshot, and what to confirm against your model number.

Error code F4E1
Appliance Microwave
Quick answer

F4E1 means a possible problem with the Cavity Temperature Thermistor or its wiring. The manual calls for a one-minute power reset.

Model note: Whirlpool reuses codes across series and model years, so F4E1 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

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What this code may mean.

A plain-language reading of the code — always confirm against your model’s documentation.

There may be a problem with the Cavity Temperature Thermistor or the associated wiring.

When F4E1 appears on a Whirlpool over-the-range microwave, the display is pointing at the Cavity Temperature Thermistor or the wiring that goes with it. The owner’s manual answers with a simple power reset.

Reset the power

Turn the circuit breaker off and leave it for one minute. Switch it back on, then keep an eye on the microwave for one minute to make sure F4E1 stays away. Finish by confirming the microwave runs as it should. Unplugging the unit for the same minute does the same job as the breaker.

Codes worth comparing

  • F4E4 is the Humidity Thermistor message, a neighbouring thermistor code.
  • F3T4 covers the Magnetron Temperature Thermistor.
  • F3T3 covers the Hood Temperature Thermistor.

Whirlpool microwave service in Los Angeles

If F4E1 comes back after the reset, call (310) 448-6692 for Whirlpool microwave service in Los Angeles. Keep the code, the model number and a note of the reset you tried at hand. More about the work is on the microwave repair page.

Source: Product Help: F4E1 Over-the-Range Microwave

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Safety warning before you continue.

Stop immediately if you notice smoke, sparks, a burning smell, gas odor, or water near electrical parts.

Important

Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.

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Seeing this code on your appliance?

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Tell us what’s wrong — we’ll take it from there.

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Phone (310) 448-6692
Email info@whirlpoollosangeles.support
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Service area Serving Los Angeles County and Orange County.
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