Hob makes loud buzzing or humming noise at certain power levels.

Safety first: Noise alone is not usually dangerous, but disconnect power before tightening any internal parts.

• Check cookware: Try a different pan; some pans vibrate more and cause louder noise.
• Change power level: Slightly adjust the power setting; noise often reduces at different frequencies.
• Internal check (advanced): Remove the hob and ensure all coil mounting screws and brackets are tight and that coils are not touching other components.

When to call a technician: If noise is accompanied by burning smell or errors, have the power module inspected.