F4
Gaggenau
Shorted Oven Temperature Sensor Circuit
Oven shows F4 and will not heat or shuts down mid-cycle
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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 temperature sensor, Sensor wires shorted together or to chassis, Moisture in sensor connector, Faulty control board sensor circuit
How to Fix / Troubleshooting
Safety: Disconnect power before removing panels or testing components.
- Inspect sensor and wiring: Access the oven temperature sensor from inside the cavity and at the rear. Look for pinched or melted wires.
- Test resistance: Disconnect the sensor and measure resistance. A very low reading (near 0Ω) indicates a shorted sensor.
- Check harness: If the sensor is normal, inspect the harness for spots where insulation is damaged and wires touch each other or metal.
- Dry connectors: If there are signs of moisture, dry the connector thoroughly and allow 24 hours before retesting.
- Replace components: Replace the oven temperature sensor or harness if shorted. If wiring and sensor are good, replace the electronic oven control.
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Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor (NTC)
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