The short answer: A La Cornue burner that will not light is most often a cap fouled with spillover or seated off-center, or a wet igniter, both of which an owner can clean and reseat. Persistent clicking after cleaning, or a burner that will not light on clean, dry, correctly seated hardware, points at the igniter, the spark module, or the gas valve, and those need a technician. Confirm the gas is on, dry and clean the burner, and reseat the cap. If it still will not light, book service. Here is how to read the burner safely.
How a La Cornue Burner Lights
La Cornue is the hand-built centerpiece of many Johns Creek kitchens, from the grand Chateau ranges to the CornuFe line, prized for their brass trim, enameled bodies, and powerful gas burners. Each burner works on the same principle: turning the knob opens a gas valve, an igniter sparks, and the gas ignites across a ring of ports in the burner cap. Because these ranges are built by hand rather than mass-produced, they carry no diagnostic display and no fault codes, so an ignition problem is read from the burner and the flame. That also means most ignition faults come down to the physical condition of the cap, the ports, and the igniter, which is good news, because those are the parts an owner can safely inspect and clean.
Reading a La Cornue Ignition Fault
With no code to read, you diagnose from what the burner is doing. The table maps the symptoms we get called about to the likely cause and a safe first step. Note the exact behavior before you touch anything, because it points a technician straight at the failed part.
| What You Notice | Likely Cause | First Step |
|---|---|---|
| Clicks but will not light | Wet or dirty igniter, or clogged burner ports | Turn off, dry the area, clean ports, reseat the cap |
| No click and no light | Failed igniter, spark module, or a switch fault | Confirm other burners spark; then book a diagnosis |
| Lights then goes out | Off-center cap or a partly blocked port ring | Reseat the cap squarely, clean the ports with a pin |
| Keeps clicking after lighting | Wet, cracked igniter or a cap seated off-center | Dry and clean around the igniter, reseat the cap |
| Weak or uneven flame | Clogged ports or a gas-pressure issue | Clean the ports; if still weak, book a gas check |
Clicking that will not light and persistent clicking after lighting are the two we hear about most, and both usually clear once the burner is dried, cleaned, and reseated. A burner with no spark at all more often points at a failed igniter or spark module. Use this guide for the wider picture and the burner-not-igniting problem page when you want the full walkthrough.
If a burner clicks but will not light, turn the knob off after a couple of tries so raw gas does not pool, and let the area air out for several minutes before trying again. Never bring a lit match to a burner that has been releasing gas. If you smell gas that lingers after the burner is off, shut the gas off at the range valve, open a window, leave the range alone, and do not operate any electrical switch nearby until the smell clears. A burner that will not light on clean, dry, seated hardware needs a technician, not repeated attempts.
Igniters, Caps, and Gas Valves
Three things govern whether a La Cornue burner lights. The burner cap and its port ring have to be clean and squarely seated; spillover bakes onto the ports and a cap knocked off-center misdirects the flame, which shows as a burner that clicks, lights unevenly, or goes out. The igniter has to spark cleanly at the port, and moisture, grease, or a hairline crack in the ceramic makes it spark weakly or click continuously without lighting. The gas valve behind the knob has to open fully, and a valve that has stiffened or a supply problem starves the burner of gas. We clean and reseat the cap first because it resolves so many ignition complaints, then test the igniter and spark module, and check the valve and gas supply if the flame is weak. Because this is gas work on a hand-built range, we match every part to your exact La Cornue model rather than fitting a generic substitute.
Owner Checks That Restore Ignition
Before you book, a few safe steps clear most La Cornue ignition faults. First, confirm the gas is on and that other burners light, which tells you whether the problem is one burner or the supply. Next, turn the burner off and let it cool, lift the cap, and clean the port ring; baked-on spillover clogs the small ports, and a straightened pin clears them without enlarging them. Dry the igniter and the area around it if anything has boiled over, since moisture is a common cause of clicking that will not light. Then reseat the cap squarely on its base, because an off-center cap is a frequent and easily missed cause. None of this needs a tool beyond a pin and a cloth. When a burner still will not light on a clean, dry, correctly seated cap, or clicks continuously, the igniter, spark module, or valve needs a technician.
When to Book
A burner that clicks but will not light is worth a cleaning and a reseat first. Book a technician when a burner will not light on clean, dry, correctly seated hardware, when a burner has no spark at all, when clicking continues after cleaning, or when the flame stays weak or uneven. The igniter, the spark module, and the gas valve all need proper testing, and gas work on a hand-built La Cornue is not a guesswork repair. We fit model-specific La Cornue Genuine OEM Parts selected to your model, and every repair we complete in Johns Creek carries our Completed repairs include a 180-day repair warranty. Written terms are provided with the repair. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.