Induction cooktop displays F4 and one or more zones are disabled.

Safety first: Turn off the circuit breaker and verify no power is present before removing any covers.

• Access coils: Remove the cooktop from the counter if necessary and take off the bottom cover to expose the induction coils and wiring.
• Inspect wiring: Check the affected zone’s coil leads for discoloration, burning, or loose spade connectors. Tighten or replace damaged connectors.
• Check coil condition: Look for cracks, burn marks, or broken windings on the induction coil. A visibly damaged coil must be replaced.
• Module assessment: If the coil and wiring appear intact, the fault is likely within the power module (IGBTs or driver circuitry). Replacement of the module is typically required and should be done by a qualified technician.

Do not attempt to repair a cracked or burned induction coil; always replace with the correct Asko part.