A burner that clicks and sparks but will not light, or does not spark at all, is almost always an ignition-system problem: a worn spark electrode, a clogged burner port, moisture under the cap, or a failed gas safety valve. On a professional range these parts take heat and spills, so they wear over time.
Because ignition involves gas, the diagnosis has to be done correctly and safely. Below is how ignition faults present across the common range and cooktop brands, and what we clean or replace to restore a clean, reliable flame.
Notes by Brand
The same symptom can point to different components depending on the brand. Here is how it tends to present across the appliances we service.
| Brand | How It Presents |
|---|---|
| Wolf | Sparks-but-no-light usually means a worn igniter, a clogged port, or a failed gas safety valve not opening. |
| Viking | Viking burners commonly need the spark electrode or module replaced and the ports cleaned to relight reliably. |
| Thermador / Bosch | Star-burner cooktops often fail at the spark module or from moisture and debris under the cap. |
| La Cornue | A burner that lights then dies points to a thermocouple or safety valve on these hand-built ranges. |
Quick Diagnostic Guide
| Code / Symptom | What It Means | What We Do |
|---|---|---|
Sparks, won't light | Clogged port, worn igniter, or bad valve | Clean the ports, replace the igniter or valve |
No spark at all | Failed spark module or electrode | Replace the module or electrode |
Lights then goes out | Thermocouple or safety valve fault | Replace the thermocouple or valve |
Clicks continuously | Wet or misaligned burner cap | Dry and realign the cap, replace the module |
IF You Smell Gas, Stop
If you smell gas, do not operate any switch or ignition. Shut off the gas supply, ventilate the room, and if the odor is strong leave and call your gas utility. Schedule the ignition repair once the area is safe.
Dealing with This in Southampton?
Book online or call during confirmed business hours. We diagnose the exact cause and give you a written estimate before any repair.