Written by
Tessa Brandt Appliance Care EditorPublished October 29, 2026
VERIFIED
Error codeF4 E4
ApplianceMicrowave
F4 E4 in brief
Humidity thermistor, or the wiring tied to it: that is what F4 E4 points toward on over-the-range Maytag microwaves.
Reset it
Kill the breaker for sixty seconds, then switch it on again. Remain near the microwave for a minute to see that the error does not reappear. Finally, confirm the microwave operates normally.
Still on the display?
Book a technician visit if F4 E4 persists.
Humidity-related neighbours
F3H is the humidity thermistor under a different code.
For Maytag microwave repair in San Francisco or the Bay Area, call (415) 649-2156. Have F4 E4 and your model number ready, and say that you tried the one-minute reset.
Model compatibility: Maytag reuses codes across series and model years, so F4 E4 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
The humidity thermistor or its associated wiring may have a problem.
Important safety warning. 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.
Seeing this code on your Maytag appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your Maytag appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
