One or more induction zones do not respond and the display shows F02.

Safety: Isolate the appliance from mains power before removing it from the worktop or opening any covers.

• Reset and test: Switch off power at the breaker for 5 minutes, then restore power. Test each zone individually to identify which zone triggers F02.
• Check cookware: Use a flat-bottomed, induction-compatible pan of appropriate size. Some De Dietrich hobs will show an error if the pan is too small or not magnetic.
• Inspect wiring: Remove the hob and access the underside. Locate the coil for the faulty zone and check the spade connectors or plug harness between the coil and the power module. Reseat any loose connectors.
• Measure coil resistance: With a multimeter set to ohms, measure the resistance of the suspect induction coil (power disconnected). Compare with a known-good coil on another zone. A reading of open circuit or a drastically different value indicates a faulty coil.
• Board evaluation: If the coil measures correctly and wiring is sound, the fault is likely in the power stage (IGBTs or driver circuit) of the power module. Replacement of the entire module is recommended.

Note: Component-level repair of the power module is not recommended for non-professionals due to high voltages and complex circuitry.