F4
Falcon
Oven Temperature Sensor Circuit Shorted
Falcon range displays F4 and may prevent oven operation; sometimes intermittent depending on temperature.
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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 insulation melted and shorting to chassis, Moisture in sensor connector, Failed EOC reading shorted input
How to Fix / Troubleshooting
Safety first: Turn off power at the mains. Do not work on live circuits.
- Inspect sensor and wiring: Remove the oven back panel and visually inspect the sensor lead and harness. Look for melted insulation or wires touching metal.
- Measure resistance: Disconnect the sensor and check resistance at room temperature. A very low reading (near 0 Ω) indicates a shorted sensor; replace it.
- Check for moisture: If the fault appears after steam cleaning or heavy moisture use, dry the sensor connector and harness thoroughly and allow the oven to air out before retesting.
- Replace control if needed: If the sensor and wiring are good but F4 remains, the EOC may be misreading the circuit and should be replaced.
Do not tape over or bypass the sensor wiring; this can create a shock or fire hazard.
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Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor (RTD Probe)
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