Whirlpool Microwave F9 — What It Means & How to Fix It
A plain F9 means the oven could not execute the function, with a possible problem in the appliance control board, the relay control board, or the wiring; reset power and call service.
What this code means
Whirlpool says that with F9 the oven could not execute the function and there may be a problem with the appliance control board, the relay control board, or the associated wiring.
Whirlpool over-the-range microwaves; F9Q1 is a touchpad code.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Control board fault | Common | No — technician job |
| Relay board fault | Common | No — technician job |
| Glitch | Occasional | Yes — breaker reset |
What you can try yourself
- Breaker off for one minute, then on.
- Monitor for a minute.
- Verify operation.
- Schedule service on a repeat.
When to call a technician
- Repeat code.
- No heat.
- Runs with the door open — turn off the breaker.
Typical professional repair cost: About $200–$400.
Frequently asked questions
What does F9 mean on a Whirlpool microwave?
The oven could not execute the function; possible appliance control board, relay control board or wiring problem.
Is it worth repairing?
Compare the quote with the price of a new unit; board repairs can approach it.
How to reset?
Breaker off one minute.
Sources checked
Error meanings can vary by model. This guide was checked against the documentation above; use the manual for the model number on your own appliance when it differs.
Related Whirlpool codes
- Whirlpool Microwave E03 E03 — or a plain F2 — means the keypad reported a problem to the control board; reset power for one minute and call for service if it comes back.
- Whirlpool Microwave SE SE means there is a problem with the keypad (user interface) or its wiring — clean and dry the panel, reset power for a minute, and call service if SE remains.
- Whirlpool Microwave E11 E11 and E12 point to the microwave's gas sensor — the sensor used for automatic cooking — or its wiring; reset power for a minute, and expect to need a technician if it returns.
- Whirlpool Microwave E13 E13 means the oven did not pre-heat correctly, with a possible problem in the appliance control board or its wiring; reset power for a minute and call service if it repeats.
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