Jenn-Air Oven Error Code F4E1-1

F4E1-1 indicates that the microwave cavity temperature sensor has been detected in a shorted condition by the main control board. The sensor is a thermistor that monitors internal microwave cavity temperatures during operation. When its resistance drops to an abnormally low level consistent with a short circuit, the control board logs this fault and disables the affected function. The issue can be in the sensor itself, the wiring, or the connectors.

Standard bake and broil functions on the oven may still operate depending on how your specific model handles this fault, but the microwave function should not be used while this code is active. The control board has flagged an abnormal sensor condition, and continuing to run affected modes could mask further issues. Disconnect power and have the fault diagnosed before resuming regular use of the microwave cavity functions.

Repair costs depend on the root cause. If only the wiring or connectors need attention, a service call fee alone may cover the repair, typically in the range of $75 to $150 for diagnostics. Replacing the microwave cavity temperature sensor usually adds $50 to $150 in parts. If the main control board is at fault, parts alone can range from $150 to $400 or more, plus labor, making total repair costs potentially $250 to $600 depending on your location and service provider.

Some causes of this error, such as a loose connector or minor corrosion at the terminals, can be addressed by a knowledgeable DIYer after disconnecting power. However, working near microwave components carries serious safety risks, and access to internal wiring often requires disassembly of the unit. If you are not experienced with appliance repair, having a qualified technician perform the diagnosis and repair is strongly recommended.

Unplugging the oven or tripping the circuit breaker for a few minutes will clear the error from the display temporarily. However, if the underlying problem, whether a shorted sensor, damaged wiring, or corroded connector, has not been corrected, the F4E1-1 code will return as soon as the appliance attempts to use the microwave temperature sensor again. A reset is a useful first step to confirm whether the fault is intermittent, but it is not a repair.