A La Cornue range is a hand-built gas instrument, and its burners are deliberately simple, which is why there is no error-code display to consult. When a burner acts up, the range tells you through what you can see and hear: whether it clicks, whether it lights, and whether the flame holds once you let go of the knob. Each of those behaviors points at a different part, so this guide works from symptom to cause the way a technician does.
Read the Burner Behavior
Start by naming exactly what happens. A burner that clicks steadily but never lights has spark and no successful ignition, usually a cap or port problem. A burner that lights at once but dies the moment you release the knob has flame but no confirmation, which is the thermocouple. And a burner with no click at all points to the spark igniter or its switch rather than the gas side. The table below maps those signs to the fix.
| What You See | Likely Cause | Our Fix |
|---|---|---|
| Clicks steadily, no flame | Wet or off-center cap, clogged ports | Dry and align cap, clean ports |
| Clicks, flame is weak or uneven | Soiled burner ports or igniter tip | Clean ports and igniter, verify gas |
| Lights, dies when knob released | Weak or dirty thermocouple | Clean or replace the thermocouple |
| No click at all on one burner | Failed spark igniter or switch | Test and replace igniter or switch |
| All burners fail to spark | Spark module or power fault | Test the spark module and supply |
Safety first: if you smell gas, do not use a burner or an igniter. Shut the gas off and ventilate. A burner that clicks and releases gas without lighting should be turned off between attempts.
What You Can Clean, and Where to Stop
Removing and drying a burner cap, clearing the ports with a straightened pin, and wiping the igniter tip are all owner-safe and fix a surprising number of these complaints. Where to stop is the gas valve, the thermocouple connection at the valve, and the spark module. Those handle live gas and the safety cutout, and on a range of this value they are worth the correct parts and a warranty on the work.
La Cornue Burner Acting Up in West Chester?
Book a technician who services hand-built gas ranges. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
Why Does My La Cornue Burner Click but Not Light?
Continuous clicking with no flame usually means the igniter is sparking but the gas is not reaching or catching. A burner cap that is off-center or wet, a clogged burner port, or a soiled igniter tip are the common causes. Dry and reseat the cap, clean the ports, and if the click continues the igniter or switch may need service.
Why Does a La Cornue Burner Light Then Go Out?
A flame that lights while you hold the knob and dies when you release it points to the thermocouple or flame-sensing circuit not confirming the flame. The sensor may be dirty, out of position, or weak. Cleaning it can help, but a sensor that no longer holds the flame needs to be replaced.
Is It Safe to Keep Lighting a La Cornue Burner with a Match?
Lighting a burner by hand once to cook is common, but if a burner only stays lit when you hold the knob, the safety cutout is doing its job and should not be bypassed. Repeated failure to hold flame means gas can escape before it catches, so have the thermocouple and valve checked rather than working around them.
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