F4
Fisher & Paykel
Oven Temperature Sensor Short Circuit
F4 displayed, oven may overheat or not regulate temperature correctly
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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 NTC sensor, Moisture inside sensor connector, Pinched sensor wiring shorting to chassis, Failed sensor input on control board
How to Fix / Troubleshooting
Safety first: Disconnect power at the breaker. Do not operate the oven until the fault is resolved.
- Visual inspection: Remove the rear panel to access the sensor harness. Look for crushed or melted insulation where the harness passes through the oven liner.
- Disconnect and test sensor: Unplug the sensor and measure resistance. A very low reading (near 0 Ω) indicates a shorted sensor that must be replaced.
- Check for moisture: Inspect the connector for signs of moisture or corrosion. Dry thoroughly and clean contacts if needed.
- Harness check: If the sensor tests normal, inspect the harness for shorts to ground using a multimeter. Repair or replace any damaged sections.
- Control board: Persistent F4 with good sensor and wiring suggests a shorted input circuit on the control board; replacement is usually required.
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Repair Difficulty
Hard
4/5
Required Part
Oven Temperature Sensor Probe
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