Induction cooktops heat fast, respond instantly, and stay cooler to the touch than radiant or gas burners. They also work very differently from other cooktops, so the usual "burner is out" troubleshooting doesn't apply. Before you decide whether to repair or replace, it helps to understand what's actually under the glass.
How Induction Works, in Plain Terms
Under each cooking zone sits a copper coil. When you turn on a zone, the power electronics send high-frequency alternating current through the coil, which creates a magnetic field. That field induces current in the base of a magnetic pan, and the pan itself heats. The glass only gets hot from contact with the pan.
The key parts are:
- Induction coils, one per zone or a grid on flexible-zone models.
- Power boards (also called generator or inverter boards) that drive the coils. These contain power transistors and are the most heavily stressed electronics in the cooktop.
- Touch control board and display.
- Temperature sensors under the glass that protect against overheating.
- Cooling fan that keeps the boards within safe temperatures.
- Glass-ceramic top.
Rule Out the Cookware First
A large share of "my induction cooktop doesn't work" problems are cookware problems:
- Magnet test. A fridge magnet should stick firmly to the bottom of the pan. Aluminum, copper, glass and some stainless steel won't work.
- Size. Most zones need a minimum pan base diameter to detect a pan. Small pans and espresso pots may not register.
- Flatness. A warped base may make poor contact, flash a pan-detection symbol or heat unevenly.
- Centering. Place the pan in the middle of the zone markings.
If a pan that works on one zone doesn't work on another, the problem is likely the cooktop. If no pan works on any zone, start with power and settings.
Common Symptoms and Likely Causes
One zone dead
Often a failed section of a power board, a coil connection, or a temperature sensor for that zone. On cooktops where two zones share a generator, both may act up together.
Whole cooktop dead
Check the breaker first. Induction cooktops need a dedicated 240-volt circuit. If power is present, the control board or main power supply may have failed, or the cooktop may be in a lock mode.
Error codes
Codes vary by manufacturer. Some indicate an overheated board, a sensor fault, a communication error between boards, or a voltage problem. Look up the code in your manual or the manufacturer's site by model number, and note it before calling.
Zone shuts off or power drops during cooking
Overheating protection often causes this. A failing or dust-clogged cooling fan, blocked ventilation under the cooktop, or a very hot pan sitting on the glass can trigger it. Many induction cooktops also share power between zones and reduce one zone when another is set to boost; check your manual before assuming a fault.
Touch controls unresponsive
Water, grease or a pot on the controls can block touch sensing. Clean and dry the control area. If the controls are still unresponsive, a child lock may be active, or the touch board may have failed.
Power Supply and Breaker Trips
Induction cooktops draw a lot of current when several zones run at high power, so they need a correctly sized 240-volt circuit as listed in the installation manual. A breaker that trips when you use boost or several zones at once may point to a circuit that's undersized, a loose connection, or an internal fault in the cooktop. If you recently replaced a radiant cooktop with induction, confirm with an electrician that the circuit matches the new unit's requirements. Scorch marks, a burning smell or a warm junction box are reasons to turn the breaker off and leave it off until the wiring is inspected.
Why Ventilation Matters
Induction electronics produce heat, and the cooling fan draws air from beneath or around the cooktop. If the space underneath is a drawer stuffed with towels or plastic containers, or the air intake is blocked, the boards run hotter. A hot summer kitchen adds to that. Keep the area below the cooktop clear as the installation manual specifies, and don't store items that block the vents.
Safe Checks You Can Do
- Test your cookware with a magnet.
- Check the breaker. If it has tripped, reset it once. If it trips again, leave it off and call for service.
- Look for a child lock or control lock symbol, and unlock it as described in the manual.
- Clean and dry the glass and touch area.
- Note any error code and the zone it relates to.
- Power-cycle the cooktop by turning off the breaker for a minute, which sometimes clears a temporary control fault.
Do not remove the glass or open the cooktop. Induction power boards can hold a charge after power is off, and the cooktop is wired to a high-voltage circuit.
Cracked Glass
Glass-ceramic tops can crack from impact, from dropping heavy pans, or occasionally from thermal stress. A cracked top must not be used. On many models the glass can be replaced, sometimes as part of a top assembly including the frame. Whether it's worth doing depends on the cooktop's age, the availability of the glass for your model, and whether anything underneath was damaged by spills through the crack.
Repair or Replace?
Repair is usually worth considering when:
- The cooktop is relatively new and one board, sensor or fan has failed.
- Parts are available for your model.
- The cooktop is a high-end or built-in unit whose replacement would require countertop work.
Replacement becomes more reasonable when the glass is cracked and other boards are also failing, when parts are discontinued, or when an older cooktop has had several electronic failures. If you replace, measure the countertop cutout carefully; cutout sizes vary between brands and models.
If you're comparing induction with conventional electric cooking, our article on electric range repairs explains how coil and radiant glass-top elements fail.
Professional Help
Our cooktop repair service covers induction, radiant and gas cooktops. We start with error codes and test modes to identify which board or sensor failed, and we work on major brands including Bosch, GE, Frigidaire, Samsung and Thermador. Same-day appointments are available when booked early, and repairs carry our 90-day parts and 30-day labor warranty.