A Thermador cooktop that clicks without lighting is sparking but not catching the gas. Because the Star burner uses a wide, star-shaped port pattern, it is a little more sensitive to a dirty cap or clogged ports than a plain ring burner. That is good news for the repair, because the first and cheapest things to check are also the most common causes.
Start with the Cap and Ports
Lift the burner cap and confirm it is clean, dry, and seated square. Clear the star-shaped ports of any cooked-on food with a soft brush or a pin, dry everything, and reseat the cap firmly. A cap set slightly off or a port blocked by spillover is behind a large share of no-ignition calls, and the fix costs nothing.
IF Cleaning Does Not Fix It
A burner that still will not light after a clean cap points at the igniter or the shared spark module. If all burners click together, moisture in the module is the usual trigger, so dry the top thoroughly first. Persistent clicking after drying means the igniter or module needs replacing, which a technician tests directly.
| Symptom | Likely Cause | Our Fix |
|---|---|---|
| One burner clicks, will not light | Fouled ports or misaligned cap | Clean ports, reseat cap |
| Still clicks after cleaning | Weak or failed igniter | Replace burner igniter |
| All burners click together | Moisture or spark module | Dry thoroughly, replace module |
| Lights then drops out | Weak flame or gas supply | Verify pressure, service burner |
Safety: turn the knob off if a burner does not light promptly so gas does not build up, and never use a flame if you smell a strong gas odor.
What You Can Try, and Where to Stop
Cleaning and reseating the cap and drying the cooktop are safe and often enough. Replacing igniters or the spark module involves the gas and electrical systems and should be done by a technician who can test the repair and confirm it lights reliably.
Cooktop Still Not Lighting?
Book a Thermador specialist for the igniter or module. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
Why Is My Thermador Star Burner Not Lighting?
The Star burner has a wide port pattern that must be clean to light evenly. A cap seated off center, food in the star-shaped ports, or moisture after a spill will keep it from catching. Clean the ports carefully, dry and reseat the cap, and it often lights again.
Why Do All the Thermador Burners Click but Not Light?
Continuous clicking across all burners usually means moisture reached the shared spark module or a switch, common after a spill or cleaning. Dry the cooktop thoroughly and let it rest. If the clicking continues, the spark module or an igniter switch needs service.
Is a Thermador Cooktop That Will Not Ignite Dangerous?
A burner releasing gas without igniting can let unburned gas escape, so turn the knob off if it does not light promptly and ventilate. If you smell a strong gas odor, stop, do not use any flame or switch, and call. Persistent no-ignition should be repaired rather than worked around.
Related
Thermador Repair
Full Thermador service in West Chester.
Oven Error Codes
Reading the F-series faults.
Burner Not Igniting
Across every brand.