F4E9 flags the Smart Pop control or its wiring.
Model compatibility: KitchenAid 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.
What this code means
Possible problem with the Smart Pop control or its wiring.
Of all the codes on KitchenAid’s over-the-range microwave list, only F4E9 mentions the Smart Pop control. The entry says the control or its wiring may be the problem.
At a glance
| Code | F4E9 |
|---|---|
| What it means | Possible problem with the Smart Pop control or its wiring. |
| What you can check | Try a breaker reset: off for one minute, then on, keeping an eye on the display for a minute. Verify that the microwave operates. |
| When to call a technician | If F4E9 returns, schedule a service visit. Do not open any cover, and tell the technician the full code and the day it first appeared. |
Smart Pop: what is known
The name reads like the popcorn function. KitchenAid’s microwave index includes a “Popcorn Results” article and an “AccuPop Fail” entry. The F4E9 page does not explain the control, nor does it say how any of these relate.
Series context
- F4E1: cavity temperature thermistor
- F4E4: humidity thermistor
- F4E9: a control feature, so it is not a temperature-sensor fault
F4 codes on this microwave do not form one family of faults. The last two characters change the meaning, which is why the code must be copied down completely.
Do this
- Turn off the breaker(s) that power the microwave. Leave them off for one minute.
- Turn them on.
- Keep an eye on the display for a minute, watching for F4E9.
- Verify that the microwave operates.
What happens next
If the code is gone, you are done as far as the article goes. If it returns, the article proposes scheduling service. Owners get no intermediate step.
Before you ring
Note the full code and the day it first appeared; the article does not ask, but it gives a technician something to work with. Do not open any cover, and limit the power reset to the breaker.
Smart Pop service in KitchenAid metro areas
For microwave service in the Miami, New York, Houston, Los Angeles and San Diego metro areas, call (844) 919-2035. Mention F4E9 and the model number of the KitchenAid unit.
Source: KitchenAid Product Help, Over-the-Range Microwave Error Code
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.
Sources & references
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