Error code · Microwave

Maytag Microwave Code F4E4: Humidity Sensor Circuit

Medium · inspection needed

Code: F4E4
Appliance: Microwave
Brand: Maytag
Warranty: 30-day workmanship

What F4E4 means

F4E4 on a Maytag over-the-range microwave points to the humidity thermistor or the wiring that connects it. This sensor lets the control gauge moisture in the cooking space. When its signal is missing, F4E4 shows in the display, and the microwave may stop heating or lose its sensor-based cooking. The wiring and the sensor are the places we look first, and the rest of the microwave is often fine.

Common causes of F4E4

The humidity thermistor
Wire and connector condition on that sensor
Kitchen steam and moisture reaching the sensor

✓ One safe check you can try

1. Wipe the inside of the microwave dry and let it air out with the door open for a bit. 2. Turn the circuit breaker off for one minute, then back on. 3. Wait a minute and see whether F4E4 returns. 4. Test with a plain timed cycle first, then a sensor-cook setting.

! Why to stop there

A reset does not reveal whether the sensor, the wire or the control caused the code
We test the circuit and the sensor reading together
Written price first, and a 30-day warranty on our work

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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F4E4F4E4 questions

Does F4E4 mean steam got into my control?

Not necessarily. The code names the humidity thermistor or its wiring. Moisture can play a part in sensor trouble, so we check for signs of it while we test the circuit.

Can I still reheat food with F4E4 showing?

Try a manual timed cycle after the breaker reset. If the unit heats normally, you can use time cooking while you wait for the visit. Avoid sensor-cook buttons until it is checked.

Do you fix older Maytag over-the-range microwaves?

Yes. Many are out of warranty and still doing a good job. We quote in writing and tell you if a repair is not worth the money.

Book a visit

Still seeing F4E4?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 936-6390