Jenn-Air Oven Error Code F4E2-3

F4E2-3 indicates that the microwave magnetron temperature sensor has shorted. This sensor monitors the temperature of the magnetron, the component responsible for generating microwave energy. When the control board detects an abnormally low resistance signal from this sensor, it logs this code and may disable the microwave function to prevent damage.

You should avoid using the microwave function of the appliance until this fault is resolved. The temperature sensor exists to protect the magnetron from overheating, and operating without a functioning sensor removes that protection. The conventional oven functions may still be usable, but confirm this with a technician before relying on them.

Repair costs vary depending on what component has failed. Replacing the magnetron temperature sensor is generally a lower-cost repair, typically in the range of $75 to $200 including parts and labor. If the main control board needs replacement, costs can range from $200 to $450 or more depending on the model and labor rates in your area.

Start by disconnecting power and inspecting the wiring connections between the magnetron temperature sensor and the main control board, as a loose connector is sometimes the cause. If the connections look good, testing the sensor requires a multimeter and some comfort with appliance disassembly. Because the magnetron area involves high-voltage components, many homeowners prefer to have a qualified technician handle this repair.

Disconnecting power for several minutes and restoring it may temporarily clear the code, but it will return if the underlying problem with the sensor or its wiring is not corrected. A reset alone does not repair a shorted sensor or damaged wiring. The root cause must be diagnosed and fixed for the code to stay cleared.