DUAL-FUEL · RANGETOP · INDUCTION
Sealed-burner ignition faults, gas valve problems, induction failures and dual-fuel oven control on professional ranges and drop-in cooktops.
40-mile radius$80 diagnostic90-day labor warranty
Sound familiar?
On a professional gas range the failure is almost always at the burner, not in the electronics. Sealed burners on Wolf, Viking and Thermador rangetops use a spark electrode mounted in a ceramic insulator alongside the burner head. That ceramic cracks from thermal cycling and from being knocked with a pan. Once it cracks, the spark takes the short path to ground instead of jumping the gap to the burner, and you get clicking with no ignition. The other high-frequency item is the burner cap. Set down a millimeter off center and the flame goes uneven, lazy and yellow — which people read as a gas supply problem when it is a two-second seating issue.
Gas valves are next. The stem grease in a professional valve is a heavy silicone compound. After a decade of heat cycles it stiffens, the knob gets gritty, and the simmer detent stops holding a low flame. Griddles and infrared charbroilers fail differently: the ceramic burner face degrades and the flame pattern goes patchy, or the separate control thermostat loses its charge.
Induction is a different animal. The coils themselves almost never fail. What fails is the inverter board, the cooling fan that keeps it alive, and the supply. These cooktops run on a 240-volt circuit with two hot legs, and losing one leg at the breaker or at a loose lug kills half the cooking surface while the other half works normally. That symptom sends a lot of people shopping for a new cooktop when the fault is in the panel.
On dual-fuel ranges the top and the oven are effectively two appliances. A gas top with an electric oven means burner faults and oven faults have nothing to do with each other, and they get diagnosed separately.
The three words get used interchangeably and they are three different appliances, which matters because the parts are not shared.
A range carries its own oven underneath. A rangetop is the professional burner deck with nothing but cabinetry or a wall oven below it, which is why it turns up in almost every remodelled Jacksonville kitchen that put a pair of wall ovens in a tall cabinet. A cooktop is the lighter drop-in unit, gas, electric or induction, with a shallow chassis and no oven relationship at all.
We repair all three. The one thing we need before ordering anything is the model number from the data plate, because a burner assembly for a 36-inch rangetop and the visually identical part on the range version of the same series are frequently different castings.
We start at the data plate, not the internet. On Sub-Zero Group products the model on the tag often carries an ICB prefix ahead of the number you know the unit by, and that full string is what determines the correct part.
Gas work begins with a manometer on the manifold. Without a measured pressure, every downstream conclusion is a guess. We confirm the appliance is set for the fuel it is actually connected to, check orifice sizing, and read the pressure with burners lit rather than static. Electrodes get ohmed and inspected under light for hairline cracks. Spark modules get checked for a solid chassis ground, which is the cause of more phantom clicking than any bad module.
For induction and for electric elements we take voltage at the terminal block on both legs under load, then work inward to the inverter and the fan.
A 48-inch professional range weighs several hundred pounds and sits on a stone or wide-plank floor. Before anything moves, the gas is shut at the appliance valve, the floor is covered, and the range comes forward onto hardboard so the feet never touch the finish. Rangetops and drop-in cooktops come up from above, which is easier, but the counter edge gets protected the same way.
Everything that opens a gas joint gets leak-tested with solution on reassembly. The range is re-leveled front to back so pans sit flat, and the anti-tip bracket goes back where it belongs. We install genuine OEM parts. Burner caps and heads are model-specific, and port geometry that looks close enough will give you a flame that is not.
Almost always, on this class of equipment. Electrodes, caps, valves and igniters are modest parts on a range that was a serious purchase and is built to be rebuilt. The honest exception is a discontinued control board with no supply left. When we hit that, we say so on the first visit rather than ordering parts to find out.
Replacement is rarely just the appliance. A 48-inch range or a flush-set cooktop sits in a cut-out that was built around it, next to a hood sized for it. We would rather fix the burner.
We are an independent shop, based in Fruit Cove and working Mon–Fri 8am–6pm and Sat 9am–4pm. Call +1 (904) 977-8701.
Price bands
The repairs this appliance actually comes in for, priced after the diagnosis rather than before it.
Completed repairParts and labour
| Repair | Typical range |
|---|---|
| Diagnostic visit | $80 |
| Igniter, spark module or surface element | $210–$560 |
| Oven thermostat or temperature sensor | $190–$610 |
| Electronic control board | $440–$1,080 |
Brands
Ultra luxury United States (Fitchburg, Wisconsin)
Wolf builds cooking equipment only. We service the ranges, rangetops, cooktops, wall ovens, steam and speed ovens, coffee systems and hoods that carry the name.
Luxury United States (Greenwood, Mississippi)
Viking, the Mississippi range builder, created the professional-style home cooker. We service those ranges and rangetops, plus the built-in refrigeration, ventilation and dishwashers that go with them.
Luxury United States and Germany (BSH Home Appliances)
Thermador spans cooking, refrigeration and dishwashing. Star Burner ranges, Freedom induction, Masterpiece ovens and the panel-ready Freedom columns behind cabinet doors.
Luxury Germany
Miele puts more appliances in a luxury kitchen than any other brand. We service the refrigeration, the ovens, the dishwashers, the coffee systems and the laundry.
Ultra luxury Germany
Gaggenau is the most demanding brand in a luxury kitchen to diagnose properly. We service the ovens, Vario cooktops, combi-steam, cooling columns and wine cabinets.
Ultra luxury France
Hand-built French ranges that almost nobody in this market will touch. We service Château, Grand Palais and CornuFé burners, ovens, controls and door hardware.
Luxury United States
GE Appliances' luxury line, sold through design showrooms. We repair Monogram built-in and integrated refrigeration, Professional ranges, Advantium speed ovens, hoods and dishwashers.
Luxury United States
Whirlpool's luxury brand and the originator of the downdraft range. We repair JennAir wall ovens, pro-style ranges, cooktops, built-in refrigeration and dishwashers.
Luxury United States
Samsung-backed American brand founded in Pasadena. We repair Dacor Modernist, Professional and Contemporary cooking and refrigeration, plus legacy Epicure and Renaissance equipment.
Luxury New Zealand
New Zealand brand, Haier-owned, spanning refrigeration, cooking, dishwashing and laundry. We repair DishDrawer, CoolDrawer, ActiveSmart and Series 9 integrated units.
Premium Sweden
Scandinavian dishwashers and laundry that most local shops will not touch. We service Asko door balance systems, pumps, heaters, controls and drum suspensions.
Premium Italy
Family-owned Italian range maker from Guastalla, building cooking equipment since 1882. We repair Bertazzoni ranges, wall ovens, cooktops, hoods, dishwashers and refrigeration.
Try this first
Some of it you can genuinely sort out yourself in ten minutes. We would rather you did than paid us to.
Maintenance
A Dacor self-cleaning oven burns soil to ash at high heat behind a locked door. Empty it, scrape off heavy spills, vent the kitchen and never cancel midway.
Maintenance
Month by month, by appliance type, tuned to Northeast Florida pollen, humidity and storm season. What genuinely extends appliance life and what does nothing.
Installation Pro only
Riverside, Avondale, Old Ortega and San Marco kitchens were not built for 48-inch built-ins. What to measure, what to rewire, and what the floor will carry.
A range is the freestanding or slide-in unit with an oven underneath. A rangetop is the professional burner deck with no oven under it, dropped into the counter with cabinetry or a wall oven below. A cooktop is the lighter drop-in version, usually gas, electric or induction, with a shallower chassis. We repair all three across Jacksonville, and the part numbers differ between them even when the burners look identical, so the model number off the data plate settles it.
Yes. Oven thermostats, temperature probes and the sensors behind them are routine work, and a drifting one is the usual reason an oven runs cold without anybody noticing until baking goes wrong. We measure actual cavity temperature against setpoint across a full cycle before replacing anything. The other kind of thermostat, the one on your hallway wall, controls the heating and air conditioning - that is a separate trade and not something we service.
On a sealed-burner rangetop the spark module fires every electrode at once, so a click you hear at one burner is often being generated by a different one. Continuous clicking after ignition is almost always moisture or boil-over bridging an electrode to the burner base. Dry the well completely, seat the cap square, and if it still clicks the electrode is usually cracked and grounding through the ceramic.
Rarely. A module that has failed usually takes every burner with it, because they share one spark circuit. A single dead burner points to that burner itself — a cracked electrode, a misseated cap, a blocked port, or a gas valve that is not opening. We test the electrode and the valve before we sell anyone a module.
Yes, when the manufacturer publishes a conversion kit for that model. It is not a matter of drilling anything out. It requires the correct orifices for every burner and the oven, the right regulator setting, and a manometer check of manifold pressure afterward. We document the pressures on the invoice.
Induction electronics are cooled by a fan that pulls air through the cabinet under the cooktop. When a drawer, a heat shield or a run of trim blocks that path, the inverter reaches its thermal limit and drops the elements to protect itself. We check the ventilation clearance first, then the fan, then the inverter board.
Yes, as an independent shop. The diagnosis is the same trade skill, but be realistic about parts. Components for hand-built French and Italian ranges are ordered from the importer and lead times run longer than domestic parts. We tell you the expected wait before you commit to the repair.
Customer feedback
Rated 4.8 out of 5 across 107 customer reviews. These three describe this job in particular.
Orsolya M.Aug 14, 2026
Two burners on the Viking range would light and then drop out the moment I let go of the knob. He replaced the spark module, cleaned the ports and both hold a steady flame now without being babysat.
Verity S.Jan 22, 2026
The oven side of our range was running well under the dial and everything came out pale. He recalibrated it against a probe, then found the door seal had shrunk at one corner and replaced it. Baking is even again.
Seraphina Q.Jun 20, 2026
Two surface burners on the range would not stay lit at the simmer setting. He cleaned the ports, reseated the caps and replaced one spark module. Both hold a low flame now without dropping out.
Where we do this work
Talk to a technician
Read us the model and serial number off the data plate along with what it is doing. That is usually enough for us to tell you what we expect to find.