Induction hob zone will not heat and displays E1 shortly after switching on.

Safety first: Turn off the hob with the main power switch and, if you need to remove covers, isolate the appliance at the circuit breaker. Induction hobs contain high‑voltage components even when switched off.

Basic checks (user level):

• Use a flat‑bottomed, ferromagnetic pan (check with a fridge magnet – it should stick firmly to the base).
• Ensure the pan fully covers the marked cooking zone; very small pans may not be detected.
• Clean the glass surface and the pan base so there is no gap caused by debris or warped cookware.
• Try another zone with the same pan to see if the fault is zone‑specific.

Technical checks (technician level):

• Isolate power, remove the hob from the worktop, and access the underside.
• Inspect the pan detection coil for the affected zone on the induction generator module for signs of overheating, cracked windings, or loose connections.
• Check the wiring harness from the coil to the power board for continuity and secure plugs on the Caple induction power board.
• If the coil tests OK but E1 persists only on one zone, suspect a failed channel on the power board and replace the corresponding induction power module.

If multiple zones show E1 with known good pans, the main induction module or control board may be faulty and should be replaced by a qualified engineer.