The short answer
F4E9 is a feature-level fault: the table names the Smart Pop Control and its wiring. That control is what drives the automatic popcorn programme, which listens rather than guesses at a time. Timed cooking is unaffected; the automatic programme is what stops working.
Code table
Reference| code | meaning | owner-checkable |
|---|---|---|
| F4E9 | There may be a problem with the Smart Pop Control or the associated wiring. | partly |
| F4E4 | There may be a problem with the Humidity Thermistor or the associated wiring. | see page |
| F5 | There may be a problem with the Oven Door Latch Assembly, Door Latch Switches, or the associated wiring. | see page |
What you observe
- One automatic programme refuses or aborts — The feature that depends on this circuit is the one that fails.
- Timed cooking behaves perfectly — Manual power and time do not use this input at all.
- The code appears as the programme is selected — The control checks the circuit when it needs it, not before.
- NEAR MISS — the microwave heats nothing at all — That is a high-voltage fault with its own code, and it is far more serious.
Likeliest causes first
- The connector or harness on the circuit — First: a low-cost feature circuit runs through the same hot, greasy interior as everything else, and its connector is the usual failure.
- The Smart Pop Control itself — Second: the part is small, lightly built, and the automatic feature is the only thing that exercises it.
- The appliance manager input reading it — Last and least likely, and much the dearest to change — so it is proved rather than assumed.
Check in this order
- Confirm that timed cooking is unaffected — If manual cooking works, the fault is confined to this feature and nothing urgent is happening.
- Cut the breaker for a minute and retry the programme — Clears a latched fault; a code that returns is hardware.
- Decide whether the feature is worth the repair — This is a genuine choice here in a way it is not with a heating or safety fault.
Owner-safe steps
- Use timed cooking instead of the automatic programme — A full workaround that costs nothing and loses only the convenience.
About 5 min
- Cut the breaker for a minute, then retry once — Distinguishes a stored code from a real one.
About 10 min
- STOP HERE — the circuit is inside the appliance body — The high-voltage section shares that space, so it is not an owner job.
Safety first
Safety
Unplug the appliance or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. An oven carries a heavy element circuit behind the rear panel, and the cavity stays dangerous long after the heat is off. Leave the door lock and its switch wired exactly as they are.
When to call
Call if you want the feature back and the code survives a reset. Be clear with yourself about the value first: the appliance cooks normally, the repair means opening a microwave, and the labour is the same as it would be for a serious fault. There is nothing unsafe about continuing to use timed cooking while you decide.
Neighbouring codes — F4E4 and F5 appear beside F4E9 in the table and are recorded against different hardware — different questions with different answers. A shared prefix on this brand is not a shared fault.
What this page does not cover
This page is written for the Maytag oven class rather than for one model line, and F4E9 is read exactly as the shared table records it. If your family or model has its own page, that page is the more specific answer and it is linked below — go there first when your model is named. Left out deliberately: connector positions, wiring colours and part numbers, which are family-specific.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
