Written by
Maren Coleman Appliance Care EditorPublished October 29, 2026
VERIFIED
Error codeF9
ApplianceMicrowave
Why F9 is broader
A requested function failed, and the manual names three suspects: both the Appliance and the Relay control boards, plus the wiring. No other F-series entry in this set lists as many.
Reset sequence
Open the circuit breaker for sixty seconds.
Close it.
Stay with the microwave for a minute and see whether F9 shows once more.
Run it to be sure it works.
These steps are written for over-the-range models.
Narrower codes
F6 points at the relay board alone, while F7 points at the appliance board alone.
Whirlpool microwave repair in San Francisco and nearby
With F9 still showing after a reset, a technician visit is the next step. Reach Whirlpool microwave repair in San Francisco at (415) 687-4102, and share the model number and what you tried.
Model compatibility: Whirlpool reuses codes across series and model years, so F9 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
F9 means the oven could not execute the function; the Appliance Control Board, Relay Control Board or wiring may be at fault.
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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