Error code
La Cornue oven: an oven that has drifted hot over the years wants a thermostat, in the maker’s own words
La Cornue — an indicator rather than a code. This is the closest thing La Cornue publishes to a diagnosis, and it is a good one: if turning the temperature down with the oven control knob has not worked, or has only worked for a short time, then you may need a new thermostat — and the guide says it should be fitted by a service person.
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What we can confirm
Signal Oven getting hotter as the range ages, from the manufacturer's own documentation
This code has no number, because this equipment has no display to put one on. The appliance signals it instead — an alarm, a symbol or a pattern of lights — and what it means is recorded in the documentation that ships with it.
The signal
Oven getting hotter as the range ages
This is the closest thing La Cornue publishes to a diagnosis, and it is a good one: if turning the temperature down with the oven control knob has not worked, or has only worked for a short time, then you may need a new thermostat — and the guide says it should be fitted by a service person. What makes it worth a page is how gradual it is. An oven that has drifted 30 degrees over three years has a cook who has adapted to it entirely, and the drift is only visible against a thermometer.
or call (305) 614-3699
What it narrows down to
the thermostat has drifted and the maker says replace it
Diagnostic
From $95, credited to the repair
On the same appliance
What else belongs to the ovens
On this make a code belongs to the appliance rather than to a product line. These are the other conditions this machine can display, and the models that can show this one — a display often has more than one thing to say, and the model number decides what any of it costs to put right.
Other codes this appliance can display
an internal problem that needs a technician
the protective device keeps operating and that is a test, not a reset
the cooling fan may have failed
warm knobs above a working oven are normal
steam at the rear grille is expected on wet food
a fan whose note changes with temperature is normal
power, breaker, or no cooking function selected
level, tray size, loading and the door seal come before any part
a vaulted oven is not the oven you had before
a G9 halogen lamp, and the maker says it is not a warranty part
The same digits mean different things on different equipment. Search the full code list
In more detail
About La Cornue oven: an oven that has drifted hot over the years wants a thermostat, in the maker’s own words
What the appliance is actually doing
This is the closest thing La Cornue publishes to a diagnosis, and it is a good one: if turning the temperature down with the oven control knob has not worked, or has only worked for a short time, then you may need a new thermostat — and the guide says it should be fitted by a service person. What makes it worth a page is how gradual it is. An oven that has drifted 30 degrees over three years has a cook who has adapted to it entirely, and the drift is only visible against a thermometer.
Quoted rather than interpreted
If turning the temperature down using the oven control knob has not worked, or has only worked for a short time, then you may need a new thermostat.
From the CornuFé 110 induction installation and user guide (U111136-03, January 2023), in a User Guide & Service Manual downloaded from La Cornue's own site. Nothing on this page is decoded beyond what that sentence says.
Which machines this one applies to
La Cornue gas and dual fuel ranges. La Cornue publishes three codes in the whole of its US documentation and its Château guide carries no troubleshooting section, so a behavior missing from this archive is not proof that your appliance cannot do it — the maker simply never wrote a table for it. What its guides do document, they document in sentences, and those are on this site under the maker's own wording. The model number, and which top the range was ordered with, settle what any of it means.
What to do about it
- Put a thermometer on the middle shelf and run a full cycle, reading it every ten minutes.
- Separate overshoot from settled temperature. Spiking on the way up and settling correctly is normal; settling high is not.
- Note whether turning the dial down helps, and for how long. That distinction is the maker's own test.
- Check each oven separately on a dual-fuel range — they drift independently.
- Expect your cooking to change when it is corrected. Three years of learned adjustments become errors in the other direction.
Where this goes next
The job this usually becomes is oven thermostat calibration, and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call (305) 614-3699 and describe what the display is doing before booking anything.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards