An induction hob zone will not start, and the display shows F7 or flashes F7 when a pan is placed on it.

Safety first: Induction hobs contain high-voltage electronics. Disconnect power at the mains before removing any covers.

Steps to check:

• Verify cookware: Use a flat-bottomed, ferrous (magnetic) pan that covers most of the cooking zone. Test with a magnet; it should stick firmly to the base.
• Clean the glass: Wipe the hob surface and ensure there is no large spill, foil, or object between the pan and the glass.
• Try another zone: If the same pan works on other zones, the problem is local to the affected coil or module.
• Internal inspection (qualified persons only): Remove the hob from the worktop and take off the bottom cover. Check the wiring from the affected coil to the induction power module for loose connectors or burnt terminals.
• Check coil continuity: With a multimeter, measure the resistance of the coil. An open circuit indicates a failed coil that must be replaced.
• If the coil and wiring are OK: The induction power module or pan detection circuitry may be faulty. Replacement of the module is typically required and should be performed by a Rangemaster service engineer.