Error code
La Cornue induction hob: H is the residual heat indicator, and it means the zone is still above 140 degrees
La Cornue — an indicator rather than a code. H is not a problem, and it is on this page so that nobody calls about it.
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What we can confirm
Signal H, 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
H
H is not a problem, and it is on this page so that nobody calls about it. When a cooking zone is switched off the residual heat symbol appears in the display to show that the surface is still above 140 °F and can still burn. It goes out on its own as the glass cools. Along with the pan detector symbol, A for automatic heat-up, L for child lock, L1 and L2 for the low and simmer settings and P for power boost, it is one of the indicators this hob uses — and only three things on that display, E2, U400 and Er, are actually problems.
or call (305) 614-3699
What it narrows down to
the zone is still hot — an indicator, not a problem
Diagnostic
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On the same appliance
What else belongs to the cooktops and rangetops
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
the hob electronics are too hot and have shut down
the electrical connection is wrong and the hob has latched off
an internal problem that needs a technician
no display, which the maker puts down to the supply
the protective device keeps operating and that is a test, not a reset
it will not switch on, and both of the maker's checks are upstream
the zone cannot see a suitable pan, and pan size is the usual reason
disconnect it immediately and do not use it until it is repaired
pan noise on induction is normal at high power
scratches do not come out, and pan bases are usually the cause
the flame safety device is not holding in
usually a burner head refitted wrongly or wet after cleaning
The same digits mean different things on different equipment. Search the full code list
In more detail
About La Cornue induction hob: H is the residual heat indicator, and it means the zone is still above 140 degrees
What the appliance is actually doing
H is not a problem, and it is on this page so that nobody calls about it. When a cooking zone is switched off the residual heat symbol appears in the display to show that the surface is still above 140 °F and can still burn. It goes out on its own as the glass cools. Along with the pan detector symbol, A for automatic heat-up, L for child lock, L1 and L2 for the low and simmer settings and P for power boost, it is one of the indicators this hob uses — and only three things on that display, E2, U400 and Er, are actually problems.
Quoted rather than interpreted
When a cooking zone is switched off, the residual heat indicator symbol [H ] will appear in the display. This shows that the cooking zone temperature is above 140 °F (60 °C) and may still cause burns.
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 induction cooktops and rangetops, and the electric and multifunction ovens. 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
- Read it as information. The zone is hot, that is all it says.
- Wait for it to clear rather than cleaning the glass while it shows.
- Learn the rest of the indicators too — an L that a child switched on accounts for a surprising number of calls about dead cooktops across this industry.
- If H shows on a zone that has not been used, or never clears, that is worth a look — a temperature sensor reading wrongly can produce it.
- Do not confuse it with a code. Three codes exist on this make and H is not one of them.
Where this goes next
The job this usually becomes is diagnostic visit, 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