What is going on
When one zone on a cooktop stops heating, or the whole surface goes dark, the cause depends on the technology under the glass. Induction cooktops from Bosch, Gaggenau, and Samsung rely on power modules that drive each coil. Radiant electric models from Dacor and LG use resistive elements switched by relays. Gas cooktops depend on igniters and valves. Each platform fails in its own way, and Onyx technicians have spent 24 years learning those patterns.
Symptoms tell a story. An induction zone that detects a pan but never heats points to a failed generator board. A radiant element that glows at the edges only, or not at all, is usually the element itself or its limiter. Error codes and unresponsive touch controls suggest a control or filter board. Our technicians read these signs, confirm them with meters and factory service data, and repair the fault with genuine OEM parts. The $95 diagnostic is waived with your repair.
If your gas cooktop has a burner that will not light and you notice a gas smell, stop using the cooktop, ventilate the room, and call us at (747) 777-9728 right away. Everything else about a cooktop repair can wait for an appointment. Escaping gas cannot.
The usual suspects
What fails inside a cooktop.
Induction power modules
Each induction zone is driven by a generator board that produces the magnetic field. Power surges and heat stress kill these modules, leaving a zone that beeps, shows an error, or simply stays cold. We replace the failed module with a genuine OEM board.
Radiant elements
Ribbon elements under the glass burn through with age, so a zone stops glowing or heats only partway. We test each element for continuity and resistance and fit the exact factory replacement.
Power and filter boards
The main power board distributes current to every zone, and a failure here can darken half the surface at once. We diagnose the board, its relays, and its connections and restore full power to the cooktop.
Touch controls
Capacitive touch panels fail from moisture, heat, and age, leaving a cooktop that will not respond, locks itself, or shuts zones off at random. We replace the control assembly and verify every function before we leave.
High limit sensors
Each radiant zone has a limiter that cuts power when the glass overheats. A drifted limiter cycles the element off too early, so pans never reach a proper sear. We test the limiters and replace any that trip below specification.
Gas igniters and valves
On gas cooktops, eroded electrodes, failed spark modules, and worn valves keep burners from lighting or holding a flame. We service the full ignition path and confirm a clean, even flame at every burner.
Induction, radiant, and gas platforms share a symptom, a zone that will not heat, while hiding entirely different electronics beneath the surface. A factory trained Onyx technician knows each architecture, tests rather than guesses, and arrives with the boards, elements, and parts these repairs actually require.
Why it cannot wait
A dead zone spreads if you let it.
Cooktop faults rarely stay contained. A failing generator board can stress the boards beside it, a burned relay can overheat its harness, and a cracked element can trip breakers for the whole circuit. Cooking on the remaining zones only concentrates the wear. A prompt repair contains the damage to one component, and we offer same day service across Los Angeles.
Why Onyx
The care your kitchen deserves.
Factory trained specialists
Vetted, uniformed technicians certified across every major luxury appliance brand.
Genuine OEM parts
Only genuine components for the brand we are servicing, sourced direct. No aftermarket substitutes.
White glove home protection
Floors, stone, and cabinetry are draped and protected before a single panel comes off.
$95 diagnostic, waived with your repair
One flat diagnostic visit. Go ahead with the repair and the diagnostic costs you nothing.
Concierge scheduling
One point of contact, arrival windows kept, and updates by text or call, whichever you prefer.
Licensed and insured
Bonded and fully insured on every visit. Documentation ready on request.
Questions, answered
Before you call.
How much does cooktop repair cost?
Every visit begins with a $95 diagnostic, waived with your repair. Because induction modules and radiant elements vary widely by brand, we quote parts and labor precisely after diagnosis and before any work begins.
Do you offer same day cooktop repair?
Yes, whenever scheduling allows. We are open daily 7am to 7pm and serve all of Los Angeles and Southern California. Many radiant element and ignition repairs are completed on the first visit.
Which cooktop brands do you service?
We repair induction, electric, and gas cooktops from Bosch, Gaggenau, Samsung, LG, Dacor, Thermador, GE Monogram, Fisher & Paykel, and every other major luxury brand. Onyx is independent and not affiliated with any manufacturer.
Is it worth repairing an induction cooktop?
Usually, yes. A failed generator board or touch control is a component, not a verdict on the appliance, and replacing a built in cooktop often means countertop work as well. We give you an honest comparison of repair cost against replacement before you decide.
What warranty comes with the repair?
Our 3 Year Onyx Warranty covers the repair, parts and labor, in writing. If the zone we repaired fails again within three years, we return and make it right at no cost.
The Onyx guarantee
The 3 Year Onyx Warranty, parts and labor, in writing.
A $95 diagnostic, waived with your repair, and 24 years on luxury appliances behind every visit.
Other faults we cover
Something else acting up?
See every fault we fix across every brand we service.
Same day service · Los Angeles & Southern California
Your peace of mind is one call away.
One number, and it is handled, from diagnosis to a kitchen that simply works again.
$95 diagnostic, waived with your repair.