Gas or Electric: Which Oven You Have, and Why It Matters

La Cornue oven gas or electric: the most useful sentence you can say on the phone

"It is the left oven."

On a Château 120 and everything above it, the two cavities are two different appliances that happen to live in one enamelled body. One is a vaulted gas oven with an electric broiler above it. The other is a vaulted electric oven with its own broiler. Same door style, same handles, same brass, and nothing else in common.

That means the sentence "the oven is not heating" is two different diagnoses on this make, and which door you opened decides which parts a technician brings.

What each one is

The vaulted gas oven. A single gas burner beneath a sealed dome — 13,000 BTU on a grand oven at 3.1 cubic feet, 11,000 BTU on a standard one at 2.3 — with an electric broiler over it. No window in the door, because the door is part of the cooking mass. No fan. No display, no code, and nothing stored: the Château installation and user guide contains no troubleshooting section at all.

Its failure list is gas: an igniter that no longer draws enough current to open the safety valve, a thermocouple that no longer holds it, the valve itself, and the thermostat.

The vaulted electric oven. The other side of the same range: elements top and bottom, a thermostat, a broiler, 2.7 cubic feet on a grand oven and 2.0 on a standard one.

Its failure list is electric: elements measured cold and under load, a sensor, terminals and supports where elements actually burn out, and on the multifunction platforms a control board.

The rest of the line, briefly

Châtelet 135 and 120 — one grand vaulted oven, gas *or* electric, plus an electric warming drawer running 130 to 240 °F with a 110 lb limit per shelf. That drawer is a heated appliance in its own right and it fails on its own.

Grand Castel 90 and Castel 75 — a single vaulted oven.

Castel 60 — not a gas range at all. A four-zone induction hob with integrated controls and an electric multifunction convection oven. This is the one Château where the three published error codes are always relevant and the gas diagnostics never are.

CornuFé 90 and 110 — electric convection ovens regardless of what the cooktop is: one large oven with seven cooking modes, two convection fans and eight heating elements on the 90; two ovens behind French side-swing doors on the 110, at 2.2 and 2.39 cubic feet.

Château Tourelle — a standalone fully electric multifunction wall oven, F60 and F75, built into a cabinet run. Not the range's oven and it does not take the range's parts.

The rule most owners have never been told

When a Château is ordered with the all-induction cooktop — available on the 150, 120, 90 and 60 — the ovens are always electric. Without exception. It is a rule on La Cornue's own order form rather than a preference or a recommendation.

That is worth knowing for two reasons. It means a range with an induction top has no gas diagnostics at all, so the three published codes become the vocabulary. And it means the reverse deduction works: if somebody tells you their all-induction Château has a gas oven, one of those facts is wrong.

Why the broiler being electric matters

Every vaulted gas oven here has an electric broiler over a gas bake burner. Two heat sources, two switched circuits, one cavity.

So a range can brown things beautifully and refuse to bake, or bake perfectly and never brown. Owners describe this as "the oven is half working", which is precisely accurate. It is also the fastest free diagnosis on the appliance: an oven that broils but will not bake has already proved its supply, its control, its door and its temperature sensing are healthy.

What this changes about a service call

Three practical things.

Which door. Tell us. It is the difference between arriving with igniters and thermocouples and arriving with elements and a sensor.

Two thermostats drift independently. A range can have one oven perfectly calibrated and the other thirty degrees out, and an owner who cooks in one of them will never know about the other. It is why an annual visit measures both.

One repair does not imply the other. A gas oven that needed an igniter at year fifteen says nothing about when the electric side will want an element. They are on separate clocks.

If you do not know what you have

Look for a mode dial with icons, which means multifunction electric. Look for a plain thermostat and a broil control, which means vaulted. Look at whether the door has a window — a Château gas oven does not.

And if the paperwork exists, look at that instead. The model code and the configuration are decided at the factory and cannot be read off the appliance later, which makes the original invoice or the dealer's order confirmation genuinely more useful on this make than on any other.