The Usual Causes, Simplest First
Most no-light burners come down to the spark and the fuel meeting cleanly. Start with the burner cap: if it sits crooked or was replaced out of alignment after cleaning, the spark misses the gas. Next is a clogged port; food or cleaner can plug the tiny holes where flame should travel, leaving one section unlit. Moisture is a frequent culprit, especially right after a spill or a wipe-down, since a damp igniter shorts and clicks without a strong spark. If the cap, ports and dryness are all good, the fault is usually electrical: a worn spark igniter electrode, a failing spark module, or a burner switch that will not close. Those are the parts we test and replace.
Notes by Brand
Wolf: sealed gas burners use a spark electrode at each burner; a single dead burner is often a cracked electrode or a cap seated wrong, while all burners clicking points to one shorted switch or spark module.
Thermador: star burners rely on a clean center and a correctly placed cap; ports and moisture cause most no-light complaints, with the spark module behind the rest.
Viking and Dacor: pro burners diagnosed by checking the electrode gap, the cap fit and the igniter; some use a re-ignition circuit that needs the module tested.
La Cornue: handcrafted ranges where burner and igniter parts are specific to the model; we source model-specific components rather than substituting.
Miele: gas cooktops surface some faults on the control; the physical causes are still cap, port, moisture and spark.
Symptom, Likely Cause, and Fix
| What You See | Likely Cause | Repair |
|---|---|---|
| One burner clicks, no flame | Cap misaligned or port clogged | Reseat cap, clear ports, test spark |
| Weak or no spark | Igniter electrode or module worn | Replace igniter or spark module |
| All burners click together | Shorted switch or moisture | Dry or replace the faulty switch |
| Lights then goes out | Weak flame or valve issue | Diagnose the burner valve, adjust |
Burner Still Not Lighting?
Book a diagnostic and we will get every burner sparking and lighting cleanly. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.