La Cornue ranges are hand-built and mechanically robust, so a burner that will not light is rarely a deep fault. Far more often it is spillover fouling the spark igniter, a burner cap that has been set down wet or crooked after cleaning, or a clogged burner port. Because these ranges have no fault-code electronics, diagnosis is by flame and mechanical inspection, which keeps it straightforward.
Clean, Dry, and Seat
Lift off the burner cap and clean the igniter and the burner ports. La Cornue burners are heavy and precisely made, and a cap that does not sit exactly right, or an igniter still damp from cleaning, will keep a burner from lighting even though nothing is broken. Dry everything thoroughly, clear the ports, and seat the cap squarely before trying again.
When It Is the Igniter or Gas
If one burner will not light while others spark and light normally, that igniter may be weak or its connection loose, and it can be replaced. A burner that lights but will not hold points to a gas-flow or valve issue. On a range of this value it is worth having a technician experienced with La Cornue handle igniter and valve work so the correct parts and setup are used.
| Symptom | Likely Cause | What We Do |
|---|---|---|
| Clicks, will not light | Fouled or wet igniter, misseated cap | Clean, dry, re-seat |
| One burner dead | Weak igniter or loose connection | Test and replace igniter |
| Lights then goes out | Valve or gas-flow fault | Check valve and flame stability |
| Yellow, lazy flame | Altitude setup or dirty ports | Adjust for altitude, clean ports |
| Gas smell with clicking | Do not use | Shut off and call immediately |
When to Call
If cleaning and re-seating do not restore the burner, igniter and valve work on these ranges is best left to a technician familiar with them. Never use a burner that smells of gas. Our La Cornue maintenance guide covers upkeep, and our oven temperature guide covers the vaulted oven.
La Cornue Burner Will Not Light?
Book a technician who knows these ranges. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.