F03
De Dietrich
Cooktop Overtemperature Protection Triggered
Induction cooktop beeps and shows F03, zones shut down shortly after starting.
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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
Blocked ventilation under hob, Failed or mispositioned NTC temperature sensor, Cooling fan not running, Excessive ambient temperature in cabinet
How to Fix / Troubleshooting
Safety: Turn off the appliance at the mains before accessing the underside.
- Allow cooling: Let the hob cool for at least 30 minutes. Remove any items stored in the cabinet below that may block airflow.
- Check installation clearances: Verify that the hob cut-out and cabinet meet De Dietrich's specified clearances. There must be sufficient space for air intake and exhaust.
- Inspect cooling fan operation: Restore power and start a low-power setting on a zone. Listen for the cooling fan. If it does not run after a few minutes of operation, the fan or its supply may be faulty.
- Check temperature sensors: With power off and bottom cover removed, locate the NTC sensors clipped to the heat sink or power module. Ensure they are firmly attached and not hanging loose. A loose sensor can cause false overheat readings.
- Clean vents: Use a vacuum to remove dust from intake and exhaust vents and from the fan blades.
Escalation: If F03 persists with proper ventilation and a working fan, the NTC sensor or control board may be defective and should be tested and replaced by a professional.
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Repair Difficulty
Medium
3/5
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