F04
Fulgor Milano
Oven Sensor Circuit Open or Short
Display shows an oven temperature sensor error; oven may shut down or refuse to start.
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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
Open circuit in oven temperature sensor, Shorted sensor to chassis, Broken sensor harness, Faulty sensor input on control board
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before accessing the rear panel or control area.
- 1. Power cycle: Turn the breaker off for 2–3 minutes, then back on. If F04 reappears immediately, proceed with hardware checks.
- 2. Inspect sensor wiring: Remove the rear panel to access the sensor harness. Check for cuts, melted insulation, or connectors that have pulled loose from the control board.
- 3. Test sensor resistance: Disconnect the sensor from the harness and measure resistance. If the reading is infinite (open) or near 0 Ω (short), replace the sensor with a Fulgor Milano‑compatible NTC probe.
- 4. Check continuity of harness: With the sensor removed, test continuity from the sensor connector to the control board connector. Repair or replace the harness if open or shorted to ground.
- 5. Replace control board if needed: If sensor and harness are good but F04 persists, the sensor input circuit on the electronic control is likely damaged. Replace the main control module.
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Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor
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