Bosch induction cooktop coil failure — home cooking

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   With the zone off, place a known induction-compatible pan on the affected zone and test the pan's base with a magnet. Center the pan, choose the correct cooking zone, and set a power level according to the cooktop controls.

   Expected result: The magnet sticks and the zone heats, the pan is magnetic but the zone does not detect it, or the magnet does not stick or the pan is too small or off-center.

   Next step: Use a suitable pan of the correct size and placement. If the correctly tested pan still fails on one zone, record the result and continue to the display and comparison check.

   Stop if: Do not test with a cracked pan, touch a hot surface, or place tools or loose metal on the zone.

   Why this matters

   Why: A magnetic pan that heats supports normal zone detection. A non-magnetic, undersized, or misplaced pan can mimic a coil failure; a correctly placed known-good pan that remains cold leaves a cooktop fault open.

2. Check 2

   Compare the affected zone with another zone using the same known-good pan and the same power setting. Keep the pan centered and avoid moving it while the test is running.

   Expected result: The pan heats on another zone but not the affected zone, neither zone heats, or the affected zone begins heating after correcting placement or controls.

   Next step: Stop repeated tests if one zone remains cold with the known-good pan. Record which zones work and arrange model-specific service rather than opening the cooktop.

   Stop if: Stop immediately for smoke, burning odor, sparking, cracked glass, a hot plug, or uncontrolled heating.

   Why this matters

   Why: A pan that works elsewhere makes cookware incompatibility less likely and a zone-specific detection, control, or heating fault more likely. If no zone heats, power, settings, lock, or a broader fault remains possible. Recovery after placement points away from a failed coil.

3. Check 3

   Read the display and record every exact letter, number, flashing symbol, tone, lock indicator, or pause state. Check the Bosch error-code guide using the full cooktop model number; do not treat a residual-heat symbol as proof that the zone is energized or failed.

   Expected result: The code is listed with a documented user check, the display shows an unlisted code, or no code is shown while one zone remains cold.

   Next step: Follow only the matching Bosch instruction for a listed condition. For an unlisted or recurring code, keep the cooktop out of use and contact Bosch with the model and exact display record.

   Stop if: Do not bypass a lock or protection message, repeatedly cycle power, or substitute a code from another Bosch model.

   Why this matters

   Why: Bosch assigns different meanings to cookware, overheating, voltage, control, and time-limit conditions. An unlisted code or a persistent cold zone needs the exact model's support path and does not identify a coil or part by itself.

4. Check 4

   Inspect only the accessible exterior for a wet control panel, object over a touch key, blocked ventilation, cracked glass, damaged cord or plug, smoke, burning smell, or water near electrical parts. Keep hands dry and do not remove the glass or cabinet.

   Expected result: The panel is wet or obstructed, the cooktop has overheated but is cooling normally, no external hazard is visible, or a crack, odor, smoke, electrical damage, or uncontrolled heating is present.

   Next step: Dry and clear the panel only when safe, then follow the exact model instructions. For any hazard or persistent control or heating fault, isolate power only from a safe accessible control and arrange qualified service.

   Stop if: Do not apply water to energized controls, use CPU thermal paste, open the electronics, probe wiring, or continue cooking with a cracked surface.

   Why this matters

   Why: A wet or covered panel can prevent normal input, and Bosch documents cooling for certain overheating conditions. A crack or electrical hazard changes this from a cookware diagnosis to an immediate safety and service issue.