Thermador cooktop burner won't ignite is a known issue affecting SGS365TS. Our technicians specialize in Thermador-specific diagnostics and repair.
Thermador cooktop burner won't ignite is typically caused by clogged igniter port or failed spark module. Thermador-specific factor: star burner pedestal-mounted igniter electrode cracking from thermal fatigue — the five-point flame pattern creates unique thermal stress on the electrode position. Repair costs $80-$250 with free diagnostic and 90-day warranty.
Star Burner pedestal-mounted igniter electrode cracking from thermal fatigue — the five-point flame pattern creates unique thermal stress on the electrode position
ExtraLow simmer flame extinguishing at minimum output due to thermocouple position drift after cleaning or burner cap replacement
Spark module cross-firing between adjacent Star Burner zones from moisture ingress at the gas manifold during kitchen cleaning
Gas cooktop electronic ignition module failure on individual burner circuits — Thermador uses per-burner ignition wiring
Star Burner cap and base misalignment after cleaning preventing proper gas distribution to the five flame points
Other Thermador models may also be affected. Book a free diagnostic for confirmation.
Bay Area Thermador Star Burner ignition issues peak after professional kitchen cleanings — cleaning crews unfamiliar with the patented five-point burner design often replace the burner caps in incorrect orientation, blocking one or more flame ports. The technician re-seats caps to the alignment notch and tests all five flame points before leaving. San Francisco and Marin County homes with weekly cleaning services see this most frequently.
Remove each Star Burner cap and verify alignment to the locating notch — misaligned caps block flame ports and cause partial or no ignition
Inspect the pedestal-mounted igniter electrode for hairline cracks in the ceramic insulator — a cracked insulator shorts the spark to the burner body
Test spark module output at each electrode lead with all burner caps removed — a strong blue spark at 3-4mm gap indicates the module is functional
Check thermocouple position relative to the inner flame ring — drift of even 2mm causes the safety valve to cut gas when the flame appears normal to the eye
The technician lifts each Star Burner assembly and inspects the five-point flame pattern with caps properly aligned. Cracked igniter electrodes are replaced individually — Thermador uses per-burner wiring, so only the faulted zone is serviced. If the spark module has failed, it is replaced as a complete unit and all electrode gaps are re-verified at the factory-specified 3-4mm. For thermocouple drift, the sensor is repositioned and secured with the original mounting clip to maintain flame-detection proximity.
| Diagnostic | Free |
| Typical repair | $80–$250 |
| Repair time | 45 min-1.5 hours |
| Warranty | 90 days parts + labor |
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