When a Thermador cooktop is burner won't ignite, the real fix is rarely the culprit most guides open with. On Thermador the pattern I check first is star Burner pedestal-mounted igniter electrode cracking from thermal fatigue, and that points the diagnosis somewhere the cross-brand checklist never looks.
The short answer: Thermador Cooktop burner won't ignite#
Short version: the top reason a Thermador cooktop ends up burner won't ignite is star Burner pedestal-mounted igniter electrode cracking from thermal fatigue, and you should budget within the $80–$250 range in the table below. Because Thermador routes this system its own way, the textbook cause matters less than the brand-specific one.
The failure modes below are specific to Thermador cooktops — they are what set Thermador apart from the generic burner won't ignite checklist.
| Likely Thermador-specific cause | How often we see it | Typical repair |
|---|---|---|
| Star Burner pedestal-mounted igniter electrode cracking from thermal fatigue | Most likely | $80 |
| ExtraLow simmer flame extinguishing at minimum output due to thermocouple position drift after cleaning or burner cap replacement | Common | $80 |
| Spark module cross-firing between adjacent Star Burner zones from moisture ingress at the gas manifold during kitchen cleaning | Common | $80 |
| Gas cooktop electronic ignition module failure on individual burner circuits | Possible | $80–250 |
| Star Burner cap and base misalignment after cleaning preventing proper gas distribution to the five flame points | Possible | $80 |
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What you can safely check first#
Start with the checks a Thermador owner can safely run before booking a technician. Unplug your Thermador first whenever you reach inside.
- Rule out star Burner pedestal-mounted igniter electrode cracking from thermal fatigue. Owners miss it because the generic guides never mention it.
- Look first at extraLow simmer flame extinguishing at minimum output due to thermocouple position drift after cleaning or burner cap replacement. This is most likely the reason on these machines.
- Put eyes on spark module cross-firing between adjacent Star Burner zones from moisture ingress at the gas manifold during kitchen cleaning. It is one of the Thermador faults I confirm before ordering a part.
- Take a close look at gas cooktop electronic ignition module failure on individual burner circuits. You can usually spot it without pulling anything apart.
- Confirm the model. Parts and known quirks differ across the SGS365TS, SGSX365TS, PCG364WD and CIT367YGS line, so find the model number on the door or frame before ordering anything.
Repair cost and when to call an EasyBear technician#
Where you land in the $80–$250 range depends on which failure it actually is. A straightforward fix like star Burner cap and base misalignment after cleaning preventing proper gas distribution to the five flame points sits near the $80 end; star Burner pedestal-mounted igniter electrode cracking from thermal fatigue — more labor and often a sealed part — pushes toward the top. If the problem keeps coming back after a basic reset, it is worth booking an EasyBear technician rather than swapping parts on a guess.
Appliance Repair Technician · 11 years experience
Experienced technician with 11 years specializing in Frigidaire and Electrolux refrigerator and dryer repair with a focus on safety.
