Whirlpool Oven F4 E0 — What It Means & How to Fix It
Also shown as F4E0, F4 E8, F4 E9 on some models.
F4 E0, F4 E8 and F4 E9 point to the microwave inverter or its wiring on a combination wall oven; reset power and leave the repair to a technician.
What this code means
Whirlpool says there may be a problem with the microwave inverter, or the associated wiring.
Combination wall ovens with a microwave.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Inverter fault | Common | No — technician job |
| Wiring fault | Occasional | No — technician job |
| Glitch | Occasional | Yes — breaker reset |
What you can try yourself
- Stop using the microwave.
- Reset the breaker.
- Test with a cup of water.
- Schedule service on a repeat.
When to call a technician
- No heating.
- Repeat code.
- Buzzing or burning smell.
Typical professional repair cost: About $250–$500.
Frequently asked questions
What is the microwave inverter?
The power supply that drives the magnetron.
What do these codes mean?
A possible inverter or wiring problem.
DIY?
No — high voltage.
Sources checked
- Whirlpool Product Help: F4 E0 - Error Code - Wall Oven
- Whirlpool Product Help: F4 E8 - Error Code - Wall Oven
- Whirlpool Product Help: F4 E9 - Error Code - Wall Oven
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 Oven F0 E0 F0 E0 on a Whirlpool wall oven appears when the electronic oven control cannot recognise what type of problem has occurred; reset the breaker for one minute and call service if it returns.
- Whirlpool Oven F1 E0 F1 E0 on a wall oven indicates a possible problem with the user interface (touchpad), the control, or the wiring — clean the panel, reset the breaker, and call service if it persists.
- Whirlpool Oven F1 E1 F1 E1 points to the oven appliance manager control — one of the oven's control boards — or its wiring; reset power and call service if it returns.
- Whirlpool Oven F1 E2 F1 E2 points to the microwave user interface on a combination wall oven, or its wiring; reset power and call service if it repeats.
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