Service
La Cornue gas valve and thermocouple repair
The safety chain: a valve that will not hold open, a thermocouple that no longer tells it to, a knob that has gone stiff or will not shut off cleanly. This is the part of a gas range where nothing gets improvised and nothing gets left half-diagnosed.
- From $95 diagnostic, credited to the repair
- 59 cities and neighborhoods covered
- OEM parts available on order
- In writing the price, before anything is opened
Before you read on
What this job costs and how it is agreed
A starting figure, not a quote. What moves it is the model, how the unit is built in and which part it needs — settled after the on-site diagnostic.
Starts at
from $265
After a diagnostic from $95, which comes off the bill when you go ahead.
or call (305) 614-3699
Diagnostic
From $95, credited to the repair
The price
In writing, before anything is opened
Warranty
On the labor we performed
On the visit
How this visit actually goes
The same order every time, so nothing is opened and nothing is charged before you have seen the figure and said yes.
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01
Establish the failure mode
Will not open, will not hold, will not shut. Three different parts.
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02
Test the flame supervision
Thermocouple output measured against what the valve needs to stay energised.
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03
The valve itself
Held open, released, checked for creep. A valve that passes gas with the knob off comes out the same visit.
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04
Knob and stem
A stiff valve is a valve on its way to failing in one position. Rebuilt or replaced, not greased.
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05
Leak check and relight
Every joint opened is tested, every burner relit, and the range is left with a written note of what was replaced.
Applies to
The La Cornue units we carry this work out on
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Dual fuel · gas · all-induction — Château, Châtelet, Castel, Grand Palais, CornuFé La Cornue range repair in Miami
The range is what La Cornue makes, and everything else in the line exists around it. A Château is built to order in France, arrives in a crate weighing over half a ton, and is assembled from parts a customer chose one at a time: which oven is gas and which is electric, whether the top carries a French top, a lava-rock grill, induction or a teppanyaki plate, which of about fifty enamels, which trim metal. Two of them are almost never identical. That is the first thing a repair on one has to take seriously — the model number tells you the size, and the configuration code tells you what is actually under the lids.
- Dual fuel, all gas or all induction — three different ranges, three parts lists
- The configuration code, not just the model, decides what is on the top
- Made-to-order enamel and trim are part of the job, not an extra
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Brass gas burners · plaque coup de feu · lava-rock grill · induction · teppanyaki La Cornue cooktop repair in Miami
A La Cornue cooktop is a set of modules chosen at order time and dropped into a stainless frame: brass gas burners at 17,000 and 7,500 BTU, a 22,000 BTU power burner, the cast-iron plaque coup de feu heated by a single burner underneath, a lava-rock grill, ceramic-glass induction zones, an electric teppanyaki plate. This is the top of a range, and each module is a different repair. Sold on its own without ovens beneath it, the same top is a rangetop, and it has its own page.
- Gas, induction, French top, grill and teppanyaki modules on one frame
- Induction is the only half of this line that shows a code — E2, U400, Er
- A cracked glass hob is disconnected first and diagnosed second
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T40 to T48 · 200 mm into the counter · the same modules, no ovens beneath La Cornue rangetop repair in Miami
A rangetop is the top half of a La Cornue sold in its own right: the same brass burners, the same plaque coup de feu, the same grill, induction and teppanyaki modules, in a stainless frame 200 mm deep that drops into a counter with nothing underneath it. T40 through T48, from 600 to 1800 mm wide. Every cooktop repair applies to it and no oven repair does — which makes it the simplest appliance in the line and the one most often confused with the range on a booking.
- T40 to T48 — the same configuration codes as the range
- No ovens, no oven thermostats, no door seals
- Much lighter than a range, so the one job that prices weight rarely applies
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Vaulted ovens and convection ovens — gas, electric, and the Tourelle wall oven La Cornue oven repair in Miami
There are three different ovens on this make and they fail in three different ways. The vaulted gas oven cooks by radiant heat inside a sealed dome and has an electric broiler over it. The vaulted electric oven sits on the other side of the same range. And since 2025 there is a standalone one: the Château Tourelle, a fully electric multifunction wall oven in 60 and 75 centimeter widths, built to sit in a cabinet run next to a Château cooktop. Which of the three you have decides everything about the repair.
- Vaulted gas, vaulted electric and the electric Tourelle wall oven
- Gas ovens carry an electric broiler — browning and baking can fail separately
- Thermostat drift is measured against a probe, never adjusted by feel
In more detail
About La Cornue gas valve and thermocouple repair
About the safety chain on a gas La Cornue
A valve that will not hold, a thermocouple that no longer tells it to, a knob that has gone stiff or will not shut off cleanly. This is the part of the range where nothing is improvised: the supervision signal is measured against what the valve needs to stay energised, the valve is held open and released to see whether it creeps, and every joint that was opened is leak-tested before we leave. These are mechanical valves on a made-to-order manifold, so rebuild-or-replace is decided per valve with the reason written down.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards
Before you book
Questions about La Cornue gas valve and thermocouple repair
Can a stiff valve just be lubricated?
No, and it is the obvious wrong answer. A gas valve's taper is a sealing surface; household lubricant is a fire risk and buys a few easy weeks while the wear continues out of sight. Worse, residue can carry onto the seat and produce a valve that passes gas with the knob off, which is how a stiff knob becomes a gas smell.
Why work every valve when only one is stiff?
Because they have all done the same years in the same kitchen air, and reaching the manifold costs the same for one valve or six. The report tells you which are fine, which are marginal and which need doing, and you decide. It is the difference between one visit and three.
Where we do it
Across Miami-Dade, Broward, and Palm Beach
Same terms everywhere we go: an on-site diagnostic first, the price agreed in writing, and the exact figure confirmed once we have seen the unit.
Neighborhoods people ask for by name