Induction cooktop not recognising your pans
Cooking
Photo: dp singh Bhullar / Pexels An induction cooktop that lights up, beeps and then shuts off is usually telling you something about the pan rather than about itself. Induction works by inducing a current in ferrous metal, so a pan that is not magnetic simply cannot be heated — and the cooktop is designed to refuse rather than to try.
The magnet test
Hold an ordinary fridge magnet against the base of the pan. If it grips firmly, the pan will work. If it slides off or holds only weakly, it will not, and no setting on the cooktop will change that. Aluminium, copper and most non-magnetic stainless steel fail this test. Some pans described as induction-ready have only a thin magnetic disc bonded to the base, and those grip weakly and heat unevenly.
Size and contact matter as much as material
Each induction zone has a minimum pan diameter, and a pan smaller than that will not be detected even if it is fully magnetic. A warped or domed base is the other common cause: induction needs flat, close contact, and a pan that rocks on the glass will cut in and out. Ring-shaped burn marks on the pan base are a good sign of a warped pan.
When the cooktop is genuinely at fault
If every pan fails on one zone but works on the others, the fault is in that zone — typically its coil or the driver board behind it. If all zones fail with pans you have used successfully before, suspect the main board or the power supply. Both are real repairs and both need a technician; the distinction matters because a single zone is usually the cheaper outcome.
Error codes are worth writing down
Induction cooktops report faults as codes, and the code narrows the diagnosis considerably — overheating, fan failure, voltage problems and pan detection all report differently. Note the exact code before switching the unit off at the breaker, because a reset clears it and the technician then has to reproduce the fault from scratch.
A cracked surface is a different conversation
Glass damage on an induction top is the one failure that routinely makes replacement the better decision, because the glass is a large share of what the unit costs. Our repair-or-replace guide sets out where that line falls on each appliance.
Frequently asked questions
Why does my induction cooktop click on and off at low settings?
That is normal on many models. At low power the cooktop cycles the coil rather than running it continuously, and you hear it as a regular click. It is a design behaviour, not a fault.
Is the buzzing from the pan or the cooktop?
Almost always the pan. Multi-layer bases can vibrate at the frequency the coil runs at, and the noise is loudest with a light pan on a high setting. A heavier pan usually quietens it.