Bosch Stove Repair in Toronto — Gas burner clicks but won't light

• Clicks but won't light, one burner: the spark electrode/igniter (Bosch 00418885 on HGI-prefix sealed-burner ranges, 00612817 on NGM-family cooktop burners) is the first suspect. A hairline crack in the ceramic shield leaks the spark to ground, so you hear the click but get a weak or no arc at the burner gap. We confirm by inspecting the ceramic for cracks and watching the spark in a darkened kitchen before condemning the part.
• One burner clicks elsewhere or stays dead while the others light: that isolates to the per-burner spark ignition switch (Bosch 00189008 / ERP AP2821597) under that knob, not the shared module. The switch sends voltage to the spark module when the knob hits the LITE position; a switch worn or fouled by a boil-over spill won't pass voltage, so that single burner never sparks. Two phillips screws release it from the top of the gas valve.
• Every burner clicks but none light, or all spark randomly: that points at the shared spark module / ignition device (Bosch 12004873 / PS10058840, or 00753257 / PS8737287 by model) that powers all the electrodes. We verify the electrodes and spark wires are good first, then meter the module — a failed module is the common all-burner fix once the individual electrodes test clean.
• Clicking that started right after a cleaning or boil-over and won't stop / won't light: this is a wet or shorted igniter, not a failed part. Moisture bridges the electrode (00418885) or shorts the spark switch (00189008), making it click continuously and steal spark energy from light-off. Bosch's own guidance is to power off or unplug the range and let it dry; we dry the well and re-test before quoting any igniter, which avoids a needless part on a same-day call.
• Burner clicks and sparks fine but never catches: this is mechanical, not electrical. A burner cap seated off-center on the base moves the gas ports away from the spark gap, or grease/food has clogged the ports so gas can't reach the arc. We re-seat the cap to the locating tabs and clear the ports with a brush before touching ignition parts.
• Sparks strong but no flame after a range move, reconnect, or a gas-type mismatch: the burner is starved for gas. A bent or mis-seated surface-burner orifice holder, or a unit still set up on its LP orifices (Bosch LP conversion kit 9000989336) instead of natural-gas jets, leaves the spark with nothing to ignite. We check the orifice holder alignment and confirm the range is configured for the gas supply it's actually connected to.
• No click at all on a burner, igniter and switch test good: trace power into the spark module connector. A pinched or melted harness lead between the spark ignition switch (00189008) and the module (12004873) kills delivery to that electrode — chase the wire before condemning the board, since the module is the most expensive part in this fault chain.

Bosch gas burner clicks but won't light in Toronto — the local specifics

• The recurring Bosch-in-Toronto pattern for gas-burner-won't-light is the post-cleaning click: a customer wipes down or has a boil-over, then one or all burners click without lighting. More often than not it's a wet or grease-shorted igniter (00418885) or spark switch (00189008) that dries out and recovers, or a burner cap knocked off its tabs — so a careful dry-out, port clean and cap re-seat clears a real share of these before any part is ordered. The genuine part failures we see cluster on cracked-ceramic single-burner electrodes and, less often, an all-burner spark module.
• We roll to these calls carrying the Bosch surface igniter/electrode set (00418885 and the NGM-family 00612817), a 00189008 spark ignition switch, and the 12004873 spark module so a single-burner electrode, a dead per-burner switch, or an all-burner module fault can each be closed on the first visit. The TSSA-licensed tech also carries the means to verify NG-vs-LP orifice setup when a sparking burner still won't catch.

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 gas burner clicks but won't light guide.