Written by
Tessa Brandt Appliance Care EditorPublished October 29, 2026
VERIFIED
Error codeF4 E3
ApplianceWall Oven
Why F4 E3 appears
Two possibilities are named: the microwave exhaust air temperature sensor and the wiring that goes with it. The code applies to Maytag wall ovens generally and is not limited to one model series.
Reset and watch
Cut power to the oven for a minute at its breaker or breakers.
Turn them on so the oven starts again.
Look at the display during the next minute; the code should not come back.
Run the oven as a final check.
A persistent F4 E3 is a reason to ask for a technician.
Neighbouring codes
F4 E2 concerns the microwave sensor/thermistor and microwave appliance manager. F4 E4 covers the microwave humidity sensor and appliance manager.
San Francisco wall oven repair by phone
To get F4 E3 looked at in San Francisco or elsewhere in the Bay Area, call (415) 649-2156 or start from Maytag wall oven repair. Share the code, the model number and the reset you carried out.
Model compatibility: Maytag reuses codes across series and model years, so F4 E3 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
F4 E3 relates to the microwave exhaust air temperature sensor or the associated wiring.
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.
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Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
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Book a repair online or call us — clear estimates and approval before any repair work begins.
