Whirlpool Microwave F4E9 — What It Means & How to Fix It
Also shown as F4 E9 on some models.
F4E9 points to the Smart Pop control — the popcorn-sensing feature — or its wiring; reset power for one minute and call for service if it returns.
What this code means
Whirlpool says F4E9 may mean a problem with the Smart Pop control or the associated wiring.
Whirlpool over-the-range microwaves with a sensing popcorn feature. Models branded AccuPop show "AccuPop Fail" for a sensor fault.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Smart Pop control fault | Common | No — technician job |
| Wiring fault | Occasional | No — technician job |
| Glitch | Occasional | Yes — breaker reset |
What you can try yourself
- Reset power for one minute.
- Monitor.
- Use timed popcorn settings meanwhile.
- Schedule service on a repeat.
When to call a technician
- Repeat code.
- Popcorn function unusable.
- Other F4 codes.
Typical professional repair cost: About $120–$300.
Frequently asked questions
What does F4E9 mean?
A possible problem with the Smart Pop control or its wiring.
Can I still make popcorn?
Use a manual time if the microwave otherwise works.
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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