Written by
Maren Coleman Appliance Care EditorPublished October 29, 2026
VERIFIED
Error codeF4E9
ApplianceMicrowave
What F4E9 refers to
The code concerns the Smart Pop Control and the wiring that goes with it. For over-the-range models, the manual offers a power reset as the only first step.
The reset, step by step
Switch the breaker off and keep it off for one minute.
Switch the breaker on again.
Watch the microwave for one minute to learn whether F4E9 has returned.
Make sure the microwave operates.
Compare these codes
F6 names the Relay Control Board, and F4E4 names the Humidity Thermistor. Neither is the Smart Pop control, so check the exact letters on the display.
Repair help for Whirlpool microwaves in San Francisco
When F4E9 persists, a technician visit is the next step: Whirlpool microwave repair covers San Francisco and the Bay Area at (415) 687-4102. Give us the code, the model number and the result of the reset.
Model compatibility: Whirlpool reuses codes across series and model years, so F4E9 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
F4E9 means the Smart Pop Control or its 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 Whirlpool appliance?
Book a specialist visit for a clear estimate and approval before any repair.
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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.
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