F4
Frigidaire
Shorted oven temperature sensor circuit
Oven displays F4; may occur intermittently during preheat or while cooling down.
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Safety Warning
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.
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Possible Causes
Shorted oven temperature sensor, Sensor wiring shorted to chassis, Moisture in sensor connector, Failed EOC sensor circuit
How to Fix / Troubleshooting
Safety First: Turn off power at the breaker before servicing.
- Inspect sensor and wiring: Access the oven temperature sensor at the rear of the cavity. Check for damaged insulation or wires touching metal.
- Measure resistance: Disconnect the sensor and measure resistance at room temperature. If it reads very low (near 0 Ω) or far below spec, replace the sensor.
- Check for shorts: With the sensor disconnected, check continuity from each sensor lead to chassis ground. There should be no continuity. If there is, locate and repair the shorted wiring.
- Replace EOC if needed: If sensor and wiring are good and F4 persists, replace the electronic oven control.
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Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor
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