--- title: "Why an induction cooktop ignores a pan: magnet, size and center" description: "The magnet test, the magnetic disc that is smaller than the pan, centering on the ring, thin or warped bases, a cooktop that overheats in a tight cabinet, and…" url: "https://cooktoprepair.center/guides/why-induction-wont-recognize-a-pan/" date_modified: "2026-09-26" --- Common problems # Why an induction cooktop ignores a pan: magnet, size and center An induction cooktop not detecting pan is usually reacting to the cookware: a base a magnet will not grip, a magnetic disc smaller than the zone's minimum, a pan off center, or a warped or thin bottom. GE sets its minimum at 5 inches of magnetic base. If a proven pan fails on one zone only, the coil or its board is the likely cause. By [CooktopRepair.center technical team](https://cooktoprepair.center/authors/technical-team/) Published September 26, 2026 ## At a glance. An induction zone heats nothing on its own: it waits for a pan whose base can carry a magnetic current, and it measures that base before it switches on. When the display blinks and the pan stays cold, the cooktop has decided the pan fails that test, and it is usually right. Read the whole guide ### The one-second test A fridge magnet on the pan base If it grips firmly across the bottom, the pan can work on induction. ### Smallest pan GE accepts 5 inches across Measured across the magnetic part of the base, not the rim. ### What the display does Flashes, then gives up GE's zones flash for about 25 seconds and then switch off when no suitable pan is found. ### Cooktop-only cause A cabinet that traps the cooling air Whirlpool warns that poor ventilation can overheat an induction top and shut it down. In this guide 1. How an induction zone decides a pan is there 2. Checking the pan before the cooktop 3. When the cabinet below is the cause 4. When the cooktop really is at issue 5. Step by step 6. Questions ## How an induction zone decides a pan is there Beneath each ring on the glass lies a flat copper coil. When you select a zone, the electronics send a small test current through that coil and read how the field is loaded. An iron-bearing base close to the glass loads it in a recognizable way, and only then does the board send full power. A glass dish, a copper pot or an empty zone leaves the field unloaded, so nothing heats. That test is strict on purpose. It is what keeps a spoon or a ring left on the glass from getting hot, and why GE says an element switched on by accident generates no heat until cookware of the minimum size sits on it. The same caution makes the cooktop reject pans that are marginal, so an induction cooktop not detecting pan after pan is, far more often than not, reacting to the cookware rather than failing. ### What the flashing display means GE's help pages say a zone that finds no suitable pan flashes its power level for about 25 seconds and then turns itself off, and that lifting a pan away for more than 30 seconds also cuts power. Other makers show a pan symbol or a letter in place of the setting. Either way it is a prompt from a working cooktop, not an error from a broken one; the model's manual lists what its own symbols mean. Source: [GE Appliances — Induction Cooktop FAQs](https://products.geappliances.com/appliance/gea-support-search-content?contentId=17356) — No heat is generated unless cookware 5 inches or greater in diameter is on the element; a magnet that sticks means the pan works ## Checking the pan before the cooktop Four properties decide whether a pan registers, and each can be checked at the counter with the pan cold and upside down. Test the pan that fails first, then one you know works, on the same zone. GE gives a telling example of the second point: an 11-inch skillet may have a magnetic area only 7.25 inches across, a steel disc pressed into an aluminum body. On a large zone that disc can fall below the minimum, even though the pan looks generous. - Magnetism: a magnet should grip firmly over the whole flat base, not just in the center. - Size: the magnetic part of the base must reach the zone's minimum, which GE puts at 5 inches for its smallest zones. - Flatness: the base must lie flat on the glass; a pan that spins or rocks may not load the coil. - Thickness: GE asks for metal thicker than 0.008 inch (0.2 mm), which rules out thin foil trays and some enamel liners. ### Clad, disc-bottom and mixed-metal pans Whirlpool points out that some pans combine materials in their bases, so they heat unevenly or are not recognized at all. Tri-ply pans with a magnetic stainless outer layer usually work well. Pans sold as induction-ready often have a thin steel plate bonded under copper or aluminum, and the magnet test tells you how far that plate reaches. ### Centering on the printed ring The cooktop measures the pan by how much of the coil it covers, so GE asks for the pan to be centered inside the circle printed on the glass. A pan pushed toward the edge of a zone, or straddling two zones, can register as too small. Round pans match round coils best; bridge or flex zones on some models handle long griddles, and only those zones should be used for them. Source: [GE Appliances — Induction Burners Not Working or Flashing Power Level](https://products.geappliances.com/appliance/gea-support-search-content?contentId=34462) — Non-magnetic or undersized pans flash the power level for 25 seconds, then turn off; pan removed more than 30 seconds cuts power; center within the circular graphics; flat full contact; on 208 volts use a lid; [GE Appliances — Induction Cookware Size and Shape](https://products.geappliances.com/appliance/gea-support-search-content?contentId=17368) — An 11-inch fry pan may have only 7.25 inches of magnetic area; metal must exceed 0.008 inch (0.2 mm); heat is generated only above the cooking circle; [GE Appliances — Induction Cooktop FAQs](https://products.geappliances.com/appliance/gea-support-search-content?contentId=17356) — No heat is generated unless cookware 5 inches or greater in diameter is on the element; a magnet that sticks means the pan works Close on a fridge magnet held to the base of a steel pan above a black induction cooktop. ## When the cabinet below is the cause An induction cooktop carries its electronics just under the glass and cools them with small fans that pull air through openings in the chassis. An older GE induction manual shows air intakes on the underside and vents at the rear. Whirlpool's induction pages warn that poor ventilation makes the cooktop overheat and shut down, and lengthens boiling times, and they send owners to the installation instructions for the venting required. In practice that means a drawer stuffed up against the underside of the cooktop, a wall oven installed below without the gap the manual asks for, or a new cabinet panel that closes off an air path. A cooktop that recognizes pans when cold but starts rejecting or dropping them after ten minutes of cooking is the typical sign. ### Circuit and voltage Induction tops need a dedicated 240-volt circuit, and GE notes that on a 208-volt supply, common in apartment buildings, heating is slower and a lid helps. Low voltage slows cooking rather than stopping detection, so a zone that refuses every pan on a normal supply points elsewhere. Check the breaker if the whole cooktop is dark. Source: [Whirlpool — Not Operating Correctly, Induction Cooktop](https://producthelp.whirlpool.com/Cooking/Cooktops/Induction_Cooktops/Operation/Not_Operating_Correctly_-_Induction_Cooktop) — Mixed-material bases may heat unevenly or not be recognized; poor ventilation causes overheating, automatic shutdowns and longer boiling times; see the installation instructions for venting; [GE Appliances — Induction Cooktop Use and Care and Installation Instructions, models JP392R and JP692R (49-8269)](https://www.geappliances.com/content/older-pdfs/49-8269.PDF) — Air intakes on the underside and vents at the rear cool the coils; a ping or buzz from some pans, especially two different pans, is normal; fan noise during cooking is normal ## When the cooktop really is at issue The deciding test is simple: take a heavy, flat pan that a magnet grips firmly and that is wider than the zone's printed ring, center it, and add a little water. If that pan works on every zone except one, the problem lies inside the cooktop, most often in that zone's coil, its connection to the power board, or the power board channel serving it. Several zones failing together on the same side usually share one board. Buzzing and humming belong to a different question. The early GE manual calls a light ping or buzz from certain pans normal, especially with two different pans on neighboring zones, and fan noise during and after cooking is expected. A loud crackle, a burning smell or a zone that trips the breaker is not, and needs the power off and a technician. - One zone rejects every proven pan: that zone's coil or its link to the power board. - A whole side goes dark together: the board that serves that side. - Zones drop out after several minutes of cooking: cooling air, fan or an overheating board. - A burning smell, crackle or tripped breaker: cut the circuit and call. Source: [GE Appliances — Induction Cooktop Use and Care and Installation Instructions, models JP392R and JP692R (49-8269)](https://www.geappliances.com/content/older-pdfs/49-8269.PDF) — Air intakes on the underside and vents at the rear cool the coils; a ping or buzz from some pans, especially two different pans, is normal; fan noise during cooking is normal ## Where to stop Turn off the cooktop's circuit and have it looked at if a proven pan fails on one zone, if the cooktop trips its breaker, crackles or smells hot, or if any crack shows in the glass. The coils and power boards carry full 240-volt power just beneath the glass and are not owner-serviceable. Written by [CooktopRepair.center technical team](https://cooktoprepair.center/authors/technical-team/). The technicians sent out on the cooktop visits booked through this site. What they write comes from lifting tops out of countertop cutouts and working in the cabinet underneath, checked against the manufacturer's installation and use-and-care guides wherever those are published. Sources: [GE Appliances — Induction Burners Not Working or Flashing Power Level](https://products.geappliances.com/appliance/gea-support-search-content?contentId=34462) · [GE Appliances — Induction Cookware Size and Shape](https://products.geappliances.com/appliance/gea-support-search-content?contentId=17368) · [GE Appliances — Induction Cooktop FAQs](https://products.geappliances.com/appliance/gea-support-search-content?contentId=17356) · [Whirlpool — Not Operating Correctly, Induction Cooktop](https://producthelp.whirlpool.com/Cooking/Cooktops/Induction_Cooktops/Operation/Not_Operating_Correctly_-_Induction_Cooktop) · [GE Appliances — Induction Cooktop Use and Care and Installation Instructions, models JP392R and JP692R (49-8269)](https://www.geappliances.com/content/older-pdfs/49-8269.PDF) ## Step by step. Four steps, in the order worth doing them. 01 ### Magnet test Hold a magnet to the cold pan base in several spots and note how far the grip reaches. 02 ### Measure the disc Measure only the magnetic area and compare it with the ring on the glass and the manual's minimum. 03 ### Center and retry Center the pan inside the printed circle with a little water in it, then select the zone. 04 ### Swap pans, then zones Repeat with a proven pan and on another zone to tell a pan problem from a zone problem. For the heart of your home. ## Questions owners ask. ### Why did my induction cooktop recognize a pan yesterday and not today? Check whether the pan has warped. A base that has bowed from heating empty or from a cold-water plunge can lift off the glass enough to fail detection. Try it upside down on a flat counter to see if it rocks. ### Does an induction disc or converter plate work for non-magnetic pans? The plate itself is magnetic, so the cooktop detects it and heats it, and the plate then heats the pan by contact. Follow your cooktop manual on whether it allows them, because a hot plate loses much of induction's speed and can overheat the glass. ### Is it normal for the fan under an induction cooktop to keep running after I switch off? Many models keep the cooling fan going until the electronics have cooled. A fan that never stops even on a cold, unused cooktop is worth reporting. ## The problems behind it. Each has a page of its own: what it usually means and the causes in the order worth checking. [All 17 problems](https://cooktoprepair.center/problems/) Problem ### Induction Cooktop Not Detecting Pan 6 causes, cheapest first Problem ### Induction Cooktop Buzzing or Clicking 5 causes, cheapest first Problem ### Cooktop Fan Runs Constantly 6 causes, cheapest first Problem ### Cooktop Error Code 6 causes, cheapest first ## When it needs a technician. The repairs on the right are where this guide ends when the checks do not settle it. ### Induction board and coil repair Induction zones that stop sensing pans, cut out, buzz or show codes, traced to the power boards, the coils, their sensors and the links to the controls. ### Cooling fan and downdraft repair The fan that cools an induction or touch-control cooktop's boards, and the downdraft vent that rises behind the cooking surface or pulls air down between the burners. ### Diagnostic visit A visit that runs every burner or zone on the cooktop, looks under it from the cabinet below and names the failed part before anything is ordered. ## More in common problems. What a cooktop is telling you when a burner ticks without catching, a glass zone glows only on high, an induction zone ignores the pan or the flame turns lazy and yellow. [The whole section](https://cooktoprepair.center/guides/common-problems/) Why the cooktop behaves that way ### Why a cooktop burner clicks but won't light, from the cap to the downdraft Wet ports, a cap on the wrong head, a closed shutoff in the cabinet, air in a new line, a cooktop lock or a downdraft vent tugging the flame off the igniter: sorting them by sound. Why the cooktop behaves that way ### Why a radiant cooktop element blinks off or never turns red The limiter that switches a zone off even on high, low settings that heat without glowing, dual rings, a warped pan, a lock or half a breaker, and the point where the element itself has failed. Guides ### All 18 guides Six sections, by what you are trying to find out. --- **[Read on the site: Why an induction cooktop ignores a pan: magnet, size and center](https://cooktoprepair.center/guides/why-induction-wont-recognize-a-pan/)** **[Book a visit with CooktopRepair.center](https://cooktoprepair.center/schedule/)**