JennAir Built-In Microwave Code F3 E0: upper sensor circuit unreadable

What F3 E0 means

On JennAir built-in microwaves and microwave drawers, and on the microwave cavity of combination wall ovens such as the JMC2430DS, F3 E0 means there may be a problem with the Upper Oven Temperature Sensor, the control, or the wiring. The unit relies on that sensor to know how hot the upper cooking space is. The code shows on the display, and heating may stop until the reading returns.

Common causes of F3 E0

Upper Oven Temperature Sensor open, shorted, or reading wrongly
Control not receiving a usable sensor signal
Wiring or connector on the sensor circuit damaged

✓ One safe check you can try

1. Press Cancel and let the unit cool with the door open. 2. Turn the circuit breaker off for one minute, then restore power. 3. Run a short, simple cycle and watch the display. 4. If F3 E0 returns, stop using the appliance and book service. Do not reach behind trim or pull on wires near the cavity.

! Why to stop there

Sensor readings are only reliable when measured with a meter.
Wiring runs close to hot surfaces and live parts.
Replacing the control first would waste money if the sensor is the real cause.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Microwave codes

":" or "." in displayJennAir Built-In Message ":" or "." in display: clock needs setting F8 E3JennAir Built-In Microwave Code F8 E3: one more cooling alert Sabbath, Sab, 5Ab, or 5A6JennAir Built-In Microwave Message "Sabbath, Sab, 5Ab, or 5A6": Sabbath Mode On F8 E4JennAir Built-In Microwave Code F8 E4: exhaust air sensor SEJennAir JMV Code SE: keypad problem F8E5JennAir JMV Code F8E5: exhaust air temperature sensor F9JennAir JMV Code F9: appliance or relay control board F9Q1JennAir JMV Code F9Q1: touch pad problem

F3 E0F3 E0 questions

What part does F3 E0 point to?

It points to the Upper Oven Temperature Sensor, the control, or the wiring between them. The upper cooking space cannot be regulated safely when its temperature reading is missing.

Are F3 E0 and F3 E1 interchangeable?

They are neighbors. F3 E0 names the upper oven sensor, while F3 E1 names the lower one. Check which cavity you were using to match the code to the right sensor.

Can I still use the microwave side?

Possibly, but we would rather you did not rely on it until the code is cleared. A combination unit shares electronics, and we quote repairs in writing first.