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A clicking igniter that refuses to stop, or a burner that simply will not light, is one of the most common and most disruptive frustrations that La Cornue owners encounter. The ignition system, while engineered to be robust for a lifetime of gourmet cooking, is particularly sensitive to the heavy boilovers, sugary spills, and fine grease mist that accumulate during serious culinary use. Our ignition repair service goes far beyond simple part swapping; we perform a complete forensic audit of your range's entire electrical ignition path, from the control knob to the spark tip.

The ignition chain in a La Cornue begins at the precision microswitches mounted directly behind the solid brass control knobs. When a knob is turned to the ignite position, these microswitches complete the circuit and send voltage through a specialized wiring harness to the spark module — a high-voltage transformer that steps household current up to a voltage sufficient to jump the electrode gap. Any break in this chain — caused by heat-stress damage to the wiring insulation, moisture corrosion at a terminal connection, or a mechanically worn microswitch — results in intermittent sparking or a complete absence of spark. We specialize in diagnosing and replacing these specific harnesses and modules with factory equivalents.

We also perform a detailed inspection of the ceramic spark electrodes themselves. Over time, the porcelain insulation surrounding the electrode tip can develop hairline micro-cracks that allow the high-voltage discharge to short-circuit to the range chassis rather than jump to the brass burner cap as intended. This "phantom sparking" produces the aggravating clicking sound that occurs even when no burner is in use. These cracks are typically invisible to the naked eye but readily detectable with high-voltage leak testing equipment we carry on every service vehicle. We replace the cracked electrodes and carefully realign the burner caps to ensure the spark path is perfectly positioned within the gas flow stream.

Safety is our paramount concern when working on ignition systems. A delayed ignition — where gas flows for a fraction of a second before the spark finally fires — can allow a small pocket of combustible gas to accumulate beneath the burner cap. When the spark finally ignites this accumulated gas, it produces an audible "pop" or thump that can startle the cook, jar the burner cap out of alignment, or cause wear to the brass burner assembly over time. Our technicians calibrate the spark timing and electrode gap to factory specifications to eliminate any ignition delay and ensure a clean, immediate flame every time you engage the knob.