Jenn-Air Oven Error Code F4E1

F4E1 indicates a microwave cavity temperature sensor error. The control board has detected a problem with the signal coming from the sensor that monitors temperature inside the microwave cavity. This can be caused by a loose connector, damaged wiring, or a failed sensor. The oven stops operation when this fault is detected to prevent unsafe conditions.

It is not recommended to operate the oven while the F4E1 fault is active. The microwave cavity temperature sensor is a safety-related component, and running the appliance without a properly functioning sensor could allow the cavity to overheat without detection. Address the fault before resuming normal use.

Repair costs depend on the root cause. If the fix is simply reseating a loose connector, there may be no parts cost involved, though a service call fee typically ranges from $75 to $150. Replacing the temperature sensor itself usually adds $30 to $100 in parts. If the main control board is at fault, parts alone can range from $150 to $400 or more, plus labor.

Start by unplugging the oven or disconnecting power at the breaker. Locate the sensor probe cable and inspect the J62 connector on the control board for looseness, corrosion, or damage, and reseat it firmly. Check the rest of the wiring harness for any loose or damaged connectors. If the wiring looks good, the temperature sensor or control board may need to be tested and possibly replaced.

Disconnecting power briefly may temporarily clear the code, but if the underlying problem with the sensor circuit still exists, the error will return once the oven is powered back on. A lasting fix requires diagnosing and correcting the root cause, such as a loose connector, damaged wiring, or a failed sensor.