Cooktops are the most-used appliance in most kitchens. Multiple surfaces, multiple heat sources, constant thermal cycling. They also happen to be the most variable — a gas cooktop and an induction cooktop share almost nothing mechanically, and our technicians have to be expert in both. Fortunately, we are.
Advanced Home Appliance Repair services gas cooktops, electric coil cooktops, smooth-top radiant cooktops, and full induction cooktops across Fairfax County. Brands include Wolf, Viking, Thermador Freedom, Miele, Bosch, KitchenAid, GE Monogram, Jenn-Air, Frigidaire, Whirlpool, Samsung, and LG. Parts stocked include spark modules, burner ignitors, induction coil assemblies, inverter boards, smooth-top elements, and touch-control glass panels.
Gas Cooktop Issues
Burner clicks continuously after lighting
The spark module is stuck energized. Usually caused by moisture in the ignitor switch (from spills or cleaning), a shorted switch, or a failing spark module. Drying the switch sometimes fixes it temporarily; long-term repair means replacing the switch or module. Until fixed, you can turn off the cooktop’s 110V plug (gas cooktops have an electrical connection for ignition even though cooking is gas) to silence the clicking.
Burner won’t light, no spark
Dirty ignitor electrode (most common — food splatter insulates the electrode from generating a strong arc), failed ignitor assembly, or bad spark module. We clean, test, and replace as needed. On Wolf gas cooktops, the ignitor spacing is critical — 1/8″ gap to the burner cap — and we reset that precisely.
Weak flame or yellow flame
Yellow flame means incomplete combustion — either restricted gas flow (kinked supply line, partially closed shutoff valve, or clogged burner port) or incorrect air-gas mixture (shutter misadjusted). Propane-to-natural-gas conversions that weren’t properly redone are a common cause in older homes. We clean burner ports with wire brushes, re-set air shutters, and verify inlet gas pressure with a manometer.
Induction Cooktop Issues
Induction is different from every other cooking technology. An electromagnetic coil under the glass induces eddy currents directly in the pan’s ferrous base, heating the pan with almost no energy lost to the surrounding surface. The coil itself barely gets warm. When induction fails, failures cluster in three areas: the coil assembly, the inverter board that drives the coil with high-frequency AC, and the cooling fan that prevents the inverter from overheating.
Cooktop shuts off mid-cook, throws an error code
Usually an overheat protection event. The inverter cooling fan is blocked (lint in the filter below the unit), failing, or the ambient air is too warm (induction cooktops installed above ovens without proper insulation can cook themselves). We measure inverter temperatures, verify fan operation, and address root cause rather than just clearing the error.
One zone doesn’t heat, others fine
That specific zone’s coil or inverter section has failed. On Thermador Freedom and Miele FlexInduction, the coils are arranged in a grid and individual sections can fail while the rest of the cooktop operates normally. Replacement is zone-specific.
Touch controls unresponsive or ghost-touching
The touch panel is a capacitive glass assembly. Water trapped between the glass and the touch sensor, or a failing sensor ribbon cable, causes erratic behavior. We test the panel with manufacturer diagnostic software — not all touch panels are repairable, but many are, and we can tell you the difference.
Smooth-Top Radiant Cooktops
Traditional ceramic-glass cooktops with halogen or ribbon heating elements beneath. Common failures: element burnout (easy to diagnose visually — no orange glow when set to high), infinite-switch failure (the switch that controls element power by cycling on and off; when it sticks, the element runs full-on and can damage the glass), and glass cracking from thermal shock or impact. Glass replacement is expensive ($300-$500) and economic only on newer machines.
Downdraft Vented Cooktops
Common in Fairfax County islands where a traditional hood isn’t practical. Jenn-Air, KitchenAid, and Broan downdrafts use a pop-up or inline fan system that can fail in the motor, damper, or lift mechanism. We service all three components. Downdraft ventilation is generally less effective than overhead, so we’ll also give honest advice about whether a supplemental solution makes sense.