Why There Is No Code to Read
La Cornue builds its ranges by hand around traditional heat, and that character means there is no diagnostic display and no numbered fault code to consult. When a La Cornue oven will not heat, the diagnosis comes from the symptom and from testing the individual components, the way these ranges have always been serviced. That is a strength: the parts are accessible and repairable rather than sealed behind a board.
The first branch is whether the oven is gas or electric. A gas oven that will not heat usually has an igniter that no longer glows hot enough to open the safety valve, or a valve that will not open. An electric oven that will not heat usually has an open bake element or a failed thermostat.
Symptom, Cause, and Fix
| Symptom | Likely Cause | Typical Fix |
|---|---|---|
| Gas oven will not light | Weak or failed igniter | Replace the oven igniter |
| Igniter glows, no flame | Safety valve not opening | Replace the gas safety valve |
| Electric oven stays cold | Open bake element | Test and replace the element |
| Oven heats but wrong temp | Thermostat or sensor drift | Recalibrate or replace the control |
| No power to the oven | Wiring or terminal block | Repair the connection |
How We Approach a La Cornue
Because these ranges are hand-built and often decades in service, a careful, component-level approach matters. On a gas oven we measure the igniter to see whether it draws enough current to open the safety valve, since a weak igniter that still glows is the single most common no-heat cause. On an electric oven we test the element for continuity and check the thermostat.
We service La Cornue with respect for its construction, sourcing correct replacement parts and preserving the finish and fit. Repairs are backed by our warranty, and we take the time these ranges deserve rather than rushing a swap.
La Cornue Not Heating?
Book a diagnostic visit. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
Does a La Cornue Range Show Error Codes?
No. La Cornue ranges are built around traditional mechanical heat and do not have a diagnostic display or numbered codes. Diagnosis is done by symptom and by testing the igniter, valve, element, or thermostat directly.
Why Does My La Cornue Gas Oven Not Light Even Though It Clicks?
If the igniter glows but no flame follows, the igniter has usually weakened and no longer draws enough current to open the safety gas valve. Replacing the igniter, and testing the valve, restores heat.
Can an Older La Cornue Still Be Repaired?
Yes. These ranges are made to be serviced. The components are accessible and replacements are available, so most no-heat faults are repairable rather than requiring replacement of the range.