The plaque coup de feu is a single cast-iron plate with one 7,500 BTU burner under its center, and it is meant to be uneven — hottest above the burner, cooler as you work outwards. So the first question on a French top call is what the owner expects, and a fair share of these visits end in a demonstration rather than a repair. Where there is a real problem it is usually the burner underneath, then the underside of the plate, then the air path, then the seating, and only then the iron itself.
26 jobs · 5 appliances
La Cornue service in South Florida, on a range assembled from choices somebody made once.
Half of these jobs exist on no other site in this fleet, and not for marketing reasons. No other make here has a cast-iron plaque heated by one burner underneath it, a lava-rock grill module, a teppanyaki plate, a gas rotisserie, a vaulted oven with no window, or a range that weighs 1,320 lb in its crate. The work follows the appliance.
- 26 jobs with a published figure
- 8 jobs no sibling site has
- 5 appliance types, which is all this make builds
- from $95 diagnostic, credited to the repair
Start from the job
The work in each job, and the floor it starts from
Treat each number as a floor rather than a quote. It reflects what this equipment and this labor go for in South Florida, and what moves it is on the job's own cost page.
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from $95 Diagnostic visit
One visit, one technician, one answer in writing. On a make with three error codes in its entire documentation, the diagnostic is not a formality before the repair — it is the repair's only source of information, and it is done with instruments rather than by elimination.
- Measured, not guessed — this make reports almost nothing on its own
- The configuration code read off the range, because it decides the parts
- Written findings and a from-price before anything is opened
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from $195 Appliance maintenance
An annual visit that exists because most of what goes wrong on this make goes wrong slowly. Burners drift rich, thermostats drift hot, baffles saturate, brass tarnishes, and the owner adapts to every one of them without noticing. This is the visit that measures instead of adapting.
- Burner combustion and oven calibration checked against specification
- Baffle filters, duct flow and blower condition on the hood
- Enamel, trim and seals inspected while they are still repairable
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from $295 Appliance installation
A Château is delivered in a crate that can weigh 1,320 lb and is leveled to a specification, not to a spirit level held by eye. Installation covers gas, electrical, leveling, hood duct and the first-use check — and it covers the paperwork, because altitude, fuel type and voltage are specified at order time and have to match what is actually in the house.
- Gas and electrical to the maker's own requirements document
- Leveled to specification — a dish of water sits at one depth all over
- First-use check, and the hood duct measured rather than assumed
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from $155 Surface burner and igniter service
Clicking with no flame, a burner that lights and will not stay lit, a lazy yellow flame. On brass burners in a coastal kitchen these are three symptoms of a short list of causes, and none of them is the ignition module when only one burner is affected.
- One burner out is the electrode or the ports — not the module
- Yellow flame is air mix, fuel or an orifice, and it is measurable
- Ports cleared properly rather than poked at
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from $265 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.
- Safety valve and flame supervision tested as a system
- Stiff or leaking knob valves rebuilt or replaced, never lubricated over
- Leak-checked at every joint that was opened
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from $245 French top service
The plaque coup de feu is a single cast-iron plate heated by one 7,500 BTU burner directly under its center, and it is the most-used and least-understood part of the range. Cracks, warping, rust, dead cold spots and a burner running wrong underneath are all different problems that present the same way.
- Crazing in the seasoning and a crack through the iron are told apart
- The burner beneath it checked first — most cold spots start there
- Re-seasoned properly, so the plate is handed back working
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from $225 Lava rock grill service
A linear 14,500 BTU burner under a bed of natural lava rocks, and a module that lives its whole life under fat. Weak or uneven flame, flare-ups, a burner that will not light along its length, and rocks that have turned into a sealed crust are the calls.
- Rock bed replaced rather than raked over
- The linear burner cleared along its whole length
- Drip tray and grate condition treated as part of the job
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from $285 Teppanyaki element repair
The electric griddle module — a solid plate held between 140 and 482 degrees by an element and a control. It fails as electric things fail: no heat, one temperature only, or a plate that will not hold the setting it is given.
- Element, sensor and control measured separately
- The plate checked for flatness — a bowed griddle cooks unevenly and is not a control problem
- Temperature verified across the surface, not at one point
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from $325 Propane conversion service
La Cornue publishes a conversion procedure and a specific parts set for the CornuFé 90 and 110, and specifies fuel at order time on a Château. A conversion done with approximate parts gives yellow flames, soot and burners that will not hold a simmer — and it is one of the most common things we undo on a range that has changed house or fuel.
- The maker's own orifice set, not a universal kit
- Every burner and both ovens set and verified, not just the fronts
- Written record of what the range is now set for
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from $395 Range relocation and leveling
Moving a hand-built French range is a planned job. A Grand Palais 180 is about 710 lb uncrated, the legs are adjustable across half an inch of specified height, and a range that is out of level cooks unevenly in a way that looks exactly like an oven problem.
- Enough people and the right equipment, or it does not get moved
- Leveled to specification and verified with water on the shelf
- Gas and electrical disconnected and reconnected properly, not stretched
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from $265 Enamel panel and trim service
Vitreous enamel is glass fused to steel and about fifty colors of it were available at order time. A chip is not cosmetic in this climate — the steel under it rusts outwards — and a tarnished brass handrail attacked with the wrong product loses its lacquer along with the tarnish.
- Chips stabilized or the part ordered in the range's own color reference
- Brass, copper, nickel and chrome trim treated by what they actually are
- Clear-coated finishes identified before anything is polished
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from $285 Flamberge rotisserie repair
The gas rotisserie module: a burner, a motor, a spit and a set of controls, and a module that sits idle for months and is then expected to work on a holiday. Motor failures, a burner that will not light and a spit that will not turn under load are the three calls.
- Motor and gearing tested under a loaded spit, not empty
- The rotisserie burner treated as its own gas circuit
- Spit, forks and bearings checked for the wear that stops rotation
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from $275 Vaulted gas oven ignition repair
The vaulted gas oven has no display, no window and no error code — La Cornue's own Château guide contains no troubleshooting section at all. So an oven that will not light is diagnosed the way gas has always been diagnosed: igniter, safety valve, thermocouple, supply, in that order and with instruments.
- A glowing igniter that never opens the valve is the classic failure here
- Safety valve and flame supervision measured rather than swapped
- Same-day priority — an oven that smells of gas is not a next-week call
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from $185 Oven thermostat calibration
An oven that has drifted hot over years, and a cook who has quietly rewritten every recipe around it. The manual is explicit: an oven that gets hotter as the range ages and does not come back when the dial is turned down wants a thermostat, not a new habit.
- Measured with a calibrated probe through a full cycle
- Drift distinguished from a vaulted oven's designed unevenness
- The owner warned that a corrected oven changes their cooking
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from $255 Oven element and broiler replacement
Every vaulted gas oven on this make carries an electric broiler above it, and the electric ovens are elements throughout. That means a range can lose browning and keep baking perfectly, or the reverse, and the two are separate parts.
- Bake and broil are separate circuits and separate failures
- Elements measured cold and under load
- Element supports and terminals checked, because that is where they burn out
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from $215 Oven door seal and hinge service
On a vaulted oven the door is part of the cooking mass, and a seal that no longer pulls onto its frame turns into a cooking complaint rather than a visible leak. Long preheats, a cool front shelf and browning on one side all start here.
- Seal, catch and hinge adjusted as one system
- Door pull measured, not judged by how it sounds
- Heat loss confirmed before and after
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from $265 Wall oven repair
The Château Tourelle, F60 and F75, is fully electric and multifunction, built into a cabinet run to a cutout specification and served by its own installation guide. It fails the way a good electric oven fails — elements, fan, sensor, board — and it is not the range's oven.
- Pulled forward as a planned step, to the cutout it was fitted to
- Elements, convection fan, sensor and board measured separately
- Told apart from the range oven before the visit, so the right parts arrive
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from $235 Convection fan repair
The electric and multifunction ovens use a fan, and the noise it makes changes as the oven heats — which the manual says is normal. A fan that rumbles, ticks, slows or stops is not normal, and it takes the oven's evenness with it.
- Bearing noise separated from the normal change in note
- Motor tested at temperature, because that is when it fails
- Blade and housing checked for the contact that causes ticking
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from $325 Induction hob repair
The three codes La Cornue documents anywhere all live here: E2, the electronics are too hot; U400, the cooker is incorrectly connected; Er with a number, an internal problem the user cannot clear. Everything else on that display is an indicator, and telling the two apart saves a visit.
- E2 is investigated as ventilation first, as the maker's own guide says
- Indicators — H, the pan-missing symbol, L, A, P — are not problems
- Zone-by-zone testing with pans that meet the minimum diameters
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from $595 Induction glass replacement
The one problem on this make with a safety instruction attached. La Cornue's guide is unambiguous: a cracked hob is disconnected from the power supply immediately and not used until it has been repaired, because the glass is what separates the coils and the electronics from whatever is spilled on it.
- Made safe first, diagnosed second
- Glass ordered to the range's own configuration, not a generic panel
- Coils and electronics inspected for what has already got through the crack
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from $295 Cooktop control and wiring repair
U400 latched on the display, a hob with no display at all, a fuse or residual-current device that trips repeatedly. All three are supply-and-connection problems in the maker's own words, and all three turn up after something in the house changed.
- The appliance connection checked against the maker's specification
- Over-voltage and lost supply distinguished from a dead control
- Findings written down when the problem is upstream of the range
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from $195 Burner knob and valve rebuild
Brass knobs on mechanical valves, used several times a day for decades in a humid kitchen. Stiffness is the early warning; a knob that will not return cleanly to off is the reason this is not a job to postpone.
- A stiff valve is failing, not dry — it is rebuilt or replaced
- Knobs, bezels and stems treated as wear parts
- Every valve on the range checked, not only the one complained about
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from $285 Hood blower and capacitor repair
One 600 CFM blower on a four-speed variable motor, and on the larger motorized hoods two of them. A blower that has started to rumble will eventually stop, usually on the day the kitchen is full — and where there are two, one can fail silently while the other carries the load.
- Rumble and vibration treated as a failing bearing, not a quirk
- Capacitor tested before the motor is condemned
- On a two-motor hood, both are tested — one can fail unnoticed
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from $175 Hood filter and duct service
Faded suction with a motor that still sounds fine is almost never the motor. Baffle filters with a grease capture system are dishwasher safe, and the 600 CFM figure is specified against an unobstructed six-inch duct — eight on the inserts. Most of this job is the air path.
- Baffles cleaned or replaced first, because it costs nothing to rule out
- Duct run, damper and termination measured rather than assumed
- Airflow verified after the work, not promised
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from $165 Hood lighting and remote repair
Three 20-watt high-intensity lamps on the Château hoods, LEDs on the newer inserts, and two separate control paths — in-hood activation and a remote. A hood that answers its own buttons but not the remote is a receiver, not a motor.
- Single lamps are often a customer job and we say so
- Remote and in-hood controls tested as separate paths
- Two or three lamps out at once is a socket or supply problem, not bulbs
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from $345 Appliance control board repair
Only part of this make has electronics at all, and where it does — induction generators, multifunction oven controls, the Tourelle, motorized hood controls — a board is the last suspect rather than the first. An Er code and a measured failure send us here; an unexplained symptom does not.
- Supply, sensors and loads eliminated before a board is blamed
- Er numbers documented and quoted, since only the maker's own board clears them
- Lead time stated up front on a hand-built appliance
The job that exists nowhere else in this fleet
A French top is one burner heating a whole plate
French top service
What this list does not have
No refrigeration, because La Cornue builds none
There is no refrigerator job, no dishwasher job and no laundry job on this site, and that is not an oversight. La Cornue makes cooking appliances and nothing else — its own catalog has no refrigeration in it at all. Roughly twenty jobs that appear on our full-line sibling sites are therefore absent here, and a repair company offering them under this badge would be telling you something untrue before it arrived.
Before you book
Three minutes that change the visit
The model code, off the plate or the invoice
- Château ranges: on the frame at the side of the oven aperture, or behind the lower door.
- CornuFé: on the frame behind the door.
- The codes look like G45, T49, F75, C9-I or H17TOM — the letter names the appliance and the number is the width in centimeters.
- Photograph it rather than copying it down.
The top configuration code, if the paperwork survives
- N1 to N9 on a 180, L1 to L9 on a 165, K1 to K6 on a 150, E0 to E5 on a 120, C1 to C5 on a 90, B1 to B3 on a 75.
- It says which modules are under the lids, which is what decides the parts.
- Two ranges with the same model number can need entirely different things, and this code is what tells them apart.
- The original invoice or the dealer's order confirmation carries it, and so does the finish reference.
What it is actually doing
- Which burner, or which oven door — on a dual-fuel range one side is gas and the other is electric.
- Whether anything shows on a display. Only the induction and all-electric models have one.
- When it started, and whether anything changed in the kitchen: a breaker replaced, the range moved, a fuel conversion.
- Whether anything was cleaned in the last few days, which is the leading cause of burner calls in this climate.
By appliance
Or start from the appliance
Five cards, and each one says what the repair on that appliance actually involves.
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Dual fuel · gas · all-induction — Château, Châtelet, Castel, Grand Palais, CornuFé Ranges
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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Vaulted ovens and convection ovens — gas, electric, and the Tourelle wall oven Ovens
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
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Brass gas burners · plaque coup de feu · lava-rock grill · induction · teppanyaki Cooktops and rangetops
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 Rangetops
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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Château motorized hoods H11–H20 · island hoods · inserts · CornuFé Cascade, Euclid, Loge, Marquee Range hoods
The hood over a La Cornue is not an accessory bought to match. A motorized Château hood starts at $17,400 for the 90 and runs past $25,000 for the Grand Palais 180, it is made in the same enamels and trims as the range, and it does real work: a 600 CFM blower on a four-speed variable motor, baffle filters with a grease capture system, three 20-watt lights and a remote. When one stops, the kitchen it was built for stops working properly.
- Motorized Château hoods, island hoods and inserts, plus the CornuFé collection
- 600 CFM blower, four-speed variable motor, baffle filters, remote control
- A hood is finished to match the range — the enamel is part of the repair
Free before paid
Several of these end without a part
A pan below the minimum base diameter will not couple to an induction zone at all — 4¾ inches at the front left, 5½ at the rear, 8¼ in the center. An H on the display means residual heat, not a problem. A dish of water on an oven shelf is the maker’s own test for whether the range is level, which is behind a good share of uneven-baking complaints. A burner head refitted wet after cleaning clicks and does nothing until it dries. We would rather you found that out here.
Before you call
Questions we are asked about the work
Do you carry parts for these, or does everything come from France?
Both, and the split matters to your week. Igniters, thermocouples, safety valves, elements, thermostats, door seals, oven lamps and the common hardware are sourced domestically and are same-week jobs. A color-matched enamel panel, a vaulted-cavity component, a plaque or a control specific to one configuration is a made-to-order item from Saint-Ouen-l'Aumône, and we quote the lead time before ordering rather than after.
Is a La Cornue worth repairing, or is it time to replace it?
On this make the repair-or-replace line falls far later than on anything mass-market, and it is not close. These are hand-built appliances designed to be serviced from the front for decades, the mechanism is largely mechanical, and the expensive part — the enamelled body, the vaulted cavities, the hood canopy — is not what fails. What fails is an igniter, a valve, a thermostat, an element, a blower or a capacitor. We will tell you honestly if a range is genuinely finished, and it very rarely is.
Can you service a range that was installed before we bought the house?
Yes, and it is a large share of what we do. What we ask for is whatever paperwork came with the house, because fuel type, altitude setting, configuration and finish are decided at the factory and cannot be read off the appliance afterwards. If none survives, say so — we work it out, it simply takes longer, and it is genuinely useful to know that nobody knows.
Are you authorized by La Cornue?
No, and we say so on every page. We are an independent repair company working in South Florida, not affiliated with, authorized by or endorsed by any manufacturer, and we warrant our own workmanship. What we do have is the maker's own documentation, read and archived, and every code and condition page on this site names the guide it came from.
In more detail
What is different about servicing this make
The configuration decides the part, not the model number
On most appliances the model number is effectively the part number. Here it is half the question. A Château 150 is a G45, and a G45 can arrive with two gas burners and a large plaque, or with a lava-rock grill and a teppanyaki plate, or as an all-induction top on which both ovens are electric by rule. Nine configurations exist for that size alone. So a booking that carries the configuration code gets the right parts on the first visit, and one that does not sometimes cannot.
There is almost nothing to read
Three problem codes in the whole of the maker’s US documentation, all on the induction hob, and no troubleshooting section at all in the Château guide. That means the diagnostic is not a formality before the work — it is the only source of information there is, and it is done with instruments: gas pressure at the manifold, igniter current in amps rather than brightness, shelf temperature against the dial through a full cycle.
The finish is part of the job
About fifty enamels were available at order time, plus one-of-a-kind at an upcharge, and the trims run from polished brass to matte bronze with some of them clear-coated. A mark made while getting a blower out of a hood is a mark on a canopy that was made to match the range beneath it, and hammered finishes cannot be touched up in a kitchen at all. So the range is covered and supported before anything is undone, and a replacement panel is ordered against a color reference rather than matched by eye.
The model code, and a sentence about what it is doing.
Add the top configuration code and the finish name if you have them. Between them we can usually name a likely part before anybody sets off.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards