Microwave displays F4E3, convection or grill functions may not operate correctly

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Shorted temperature sensor, Pinched sensor wiring, Moisture in sensor connector

Safety: Unplug the microwave before inspection.

Inspect harness routing: Ensure the sensor wires are not pinched against metal panels or heating elements.
Check for moisture: If the unit was recently steam-cleaned, allow time for connectors to dry fully.
Test sensor: With a meter, verify the sensor resistance is within Whirlpool specifications. A very low resistance indicates a short.
Replace sensor: Install a new temperature sensor if shorted. Correct any wiring issues that may have caused the short.

Hard 4/5

Oven Temperature Sensor

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