This is an ordered way to narrow a La Cornue fault before you book, built around its pilots, burners, and the vaulted oven. These ranges show no numeric codes, so follow the symptom and the flame behavior down the list and stop where it answers the question.
Step-By-Step Checks
- Note whether the fault is a slow oven, an uneven oven, or a pilot that will not stay lit.
- For a pilot that dies, watch how long it holds after you release the knob; a quick drop points to the thermocouple.
- For a slow oven, time how long the vault takes to reach temperature and compare it to normal.
- For uneven heat, check whether one area of the oven or simmer plate runs hotter than the rest.
- Confirm the burners and heat deflector are sitting in their correct positions.
- If the pilot still will not hold or the oven still lags, the thermocouple or thermostat needs testing.
If you finish the list and the pilot still drops or the oven still lags, the fault is in a wear part we replace, the thermocouple or the capillary thermostat. A diagnostic visit confirms which, and fees are confirmed before approval.
The hand-built French rang Repair timing depends on diagnosis and parts availability.
Book Your Repair
We diagnose the unit, explain what failed, and quote it in writing. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.