Bosch Stove Repair in Toronto — Induction element not working / fault code

• Before any part comes off the truck on a Bosch induction (HII-prefix slide-in range or NIT/NITP cooktop) where a zone won't heat, we read the display: a 'dE' means the range is in demo mode -- controls light, the fan may run, but no induction power is generated. Bosch's own fix is to kill the breaker for ~30 seconds, restore power, and touch any control within 3 minutes to clear it. This is a no-part call that gets misread as a dead coil, so we clear demo mode before quoting anything.
• The most common 'won't heat' that is not a failed part at all is cookware: induction only couples to a ferromagnetic, flat-bottomed pan that covers most of the zone. We run the magnet test on the pan base -- if a magnet won't stick, or the pot is too small / off-centre for the zone -- the coil cannot detect a load and the zone stays cold (often with a flashing power level or an 'E'/cookware-not-detected indication). We verify cookware and centering before condemning any electronics, which keeps the customer off a needless power-module quote.
• A single induction zone genuinely dead with good ferrous cookware points at that zone's induction coil / hotplate assembly -- Bosch 12009062, the 6-7/8" induction hotplate that spans the HII8046U / HII8055U / HII8056U / HIIP055U / HIIP056U slide-in ranges and the NIT/NITP cooktops. We confirm the zone's coil and its inverter feed before ordering, because on these platforms a failed coil or its driver kills that zone while its neighbour still works; an accurate single-zone diagnosis keeps the quote off a full-cooktop replacement.
• Half the cooktop dead at once is a generator / power module signature, not a coil signature: on the BSH induction platform one power module drives a pair of zones, so two adjacent zones going dead together points at that shared module rather than two simultaneous coil failures. On a slide-in range the heating electronics route through the range-oven control board module (Bosch 12026566 on HII8055U/02, the ~$300 board) -- we isolate which zones died and meter the module's supply and connectors before condemning that board, since it is the most expensive part in this chain.
• A '5-31' code is the one that most often reads as 'induction won't heat' on these BSH boards: it is a communication fault between the control board and the heating-element / induction generator stage. We first try the documented full reset (power the range down at the breaker for ~10 minutes), then chase the harness and baseplate connectors between the control board (11036753 cooktop electronic control on HII8055U/01) and the induction stage before replacing a board -- a loose or grease-fouled connector throws the same 5-31 a failed board does.
• A zone that heats and then drops out -- or an 'F8 + H/h', 'E7015', or an 'F1/F2/F4/F6' -- is a protective shutdown, not a dead coil. F8/H is the safety time-limitation ending a zone that ran untouched too long (touch a control, re-select the zone). The thermal codes split two ways: F1/F6 mean the cooking zone / glass surface overheated, while F2/F4/E7015 mean the zone or unit electronics overheated (F4 = the whole unit). Both kinds are protective thermal shutdowns whose usual root cause is a blocked or failing cooling fan / clogged underside vents trapping heat under the glass; we clear the airflow path and re-test before quoting a coil or power module, because the part tests fine once it cools.
• If every zone is dead at once with the panel still lit, the fault is power-side, not a coil: a 'U400' (or E9000/E9010) means incoming supply voltage is out of range. Bosch induction ranges are 240V appliances that need both legs of the split-phase feed -- a tripped half-breaker, a loose lug, or a back-fed/MWBC neutral leaves the control board alive on one leg while no zone can generate heat. We meter both legs at the receptacle before touching the appliance, since this is a panel/feed fix, not a parts fix.

Bosch induction element not working / fault code in Toronto — the local specifics

• The recurring Bosch-induction-in-Toronto pattern on 'zone won't heat' is that the first read is almost never a failed coil: it is demo mode ('dE') left on after a delivery or a counter clean, or non-induction / undersized cookware that the magnet test settles on the spot -- both no-part outcomes. The genuine-fault version splits cleanly: a single dead zone is the 12009062 coil, while two adjacent zones dead together is the shared power module / control board (12026566), and a '5-31' is a communication/connector fault we reset and re-seat before replacing a board. Calling that split correctly on the first visit is what keeps these off a full-cooktop quote.
• We carry the 12009062 induction hotplate/coil, a meter and a test magnet, and the model-verified control board (12026566 / 11036753) to these Toronto calls, plus the gear to check both 240V legs at the receptacle -- so a single-zone coil, a board/power-module fault, and a panel-feed cause can each be confirmed and, where stocked, fixed in one visit.

For the full Bosch stove module — every fault, part number and code — see Bosch stove repair in Toronto, and for the same fault across all brands the stove induction element not working / fault code guide.