Thermador Freedom Induction Cooktop Repair

A cooktop with no burners

The Freedom Induction Cooktop is not a hob with elements under it. It is a dense array of induction coils and inverter electronics laid edge to edge beneath one piece of glass, with pan detection deciding in real time which coils to energise and how to group them. That architecture is why the language customers use on the phone rarely maps onto the fault. There is no burner to replace, no element to swap, and no simple continuity test that settles the question. When the left-hand third of a 48-inch surface stops responding, the honest first question is which inverter board covers that third and whether it is the board, its supply leg, or the interface telling it to run.

We diagnose these units cold, then under load, then thermally. A zone that heats for twelve minutes and quits is behaving differently from a zone that never starts, and the two failures live in different parts of the machine.

What we check first, and why

Pan detection is the most common false alarm. Induction couples to ferrous metal, so a pan that has warped, that has a sandwich base with a thin magnetic layer, or that has simply been replaced with a nicer non-magnetic one, will read as absent. We carry a magnet and a known-good test pan, and if the cooktop recognises ours it has told us something useful for free.

After that the order is unglamorous. We confirm both legs of the 240V supply at the appliance, not at the panel, because a single open leg produces exactly the symptom of half a cooktop working. We read the cooling fan, because these surfaces reject a surprising amount of heat downward and the fan is the only thing standing between the inverters and their own waste heat. Then we get into the boards.

Why installation quality decides the repair bill

Full-surface induction needs air. The manufacturer specifies clearance beneath the unit and around the cabinet cutout for a reason, and in this market we regularly open cabinets where a drawer box, a granite substrate, a run of ducting or a well-meaning sheet of insulation has closed off that path. The cooktop will work. It will also cook its own inverters, and it will do it again eight months after a board replacement.

When we find that, we say so in the written estimate before any part is ordered. Replacing a board into an installation that killed the last one is not a repair, it is a subscription. Sometimes the fix is a cabinet modification that takes an hour and costs nothing in parts.

Storm-season electronics

Northeast Florida averages around 68 thunderstorm days a year. Induction cooktops are the most electronics-dense appliance in most of the kitchens we work in, and they sit on a dedicated high-current circuit that runs a long way back to the panel. We see interface boards that survive a nearby strike while the inverter stage does not, and we see units that come back to life once the supply is corrected. A cooktop that went dark during a storm is worth diagnosing rather than replacing.

Glass, and when to stop

A chipped or cracked surface is a stop. The glass is structural and it is the only barrier between the coils and everything spilled on top of them. We will not power up a cracked surface for a customer, and we will tell you plainly when the glass cost puts the repair close enough to replacement that the decision belongs to you rather than to us.

What a visit looks like

A flat $80 diagnostic covers the visit and the findings, and it is credited toward the repair when you approve the work. You get a written estimate before a part is ordered or fitted. Parts come through the same BSH distribution channel that serves Thermador, Bosch and Gaggenau, which is one of the practical advantages of these appliances sharing a parent. Labour carries 90 days, parts carry 365.

We are an independent shop. What we have is time on these specific machines and a habit of proving the fault before quoting the part.