Induction hob or radiant cooktop shows F4 and may shut down one or more zones.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off the hob and isolate from mains. Allow the glass to cool completely before any work.
User checks:
- Wipe the glass surface dry; remove any liquid spills that may have seeped near the sensor area.
- After cooling, restore power and test again. If F4 reappears immediately, a component fault is likely.
Technical checks (qualified person only):
- Access the underside of the hob and locate the NTC temperature sensor(s) attached to the glass or to the radiant element.
- Check the sensor connector for corrosion or loose fit.
- Measure the resistance of the NTC at room temperature and compare with V-ZUG specifications.
- Inspect the harness from the sensor to the main control board for damage.
- If the sensor and wiring are OK, the fault may be on the main control board input circuit.
Repair: Replace the faulty NTC temperature sensor or, if confirmed, the main control board. Always refit thermal pads or clips exactly as original to ensure correct sensing.
Repair Difficulty
Required Part
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