An induction cooktop that keeps shutting off is often protecting itself, so the diagnosis starts with what the cooktop reports when it stops and then separates those built-in protections from installation problems and failed parts. A photo of any code on the display, plus a note of the pan, the zone and the power level, usually sets the direction.
Before the visit
- •Model and serial number, typically on a label under the cooktop or on the range frame behind the drawer.
- •The code or symbol shown when the zone stops, exactly as displayed.
- •The circumstances. Which zone, what pan, what power level, how long into cooking, and whether another zone was on.
- •The installation. Cooktop over a drawer, an oven or an enclosed cabinet, and when it was installed.
- •Access to the cooktop and the breaker.
Safe pre-checks:
- Test the pan with a magnet. Whirlpool's induction guide says to use only ferromagnetic cookware suited to induction and to match the zone to the pan's base.
- Wipe the control panel dry and clear anything resting on it.
- Turn the cooktop off at the breaker for one minute, then restore power, as Whirlpool suggests, and see whether the problem returns.
The checks, in the usual order
| Step | What's tested | What it rules in or out |
|---|---|---|
| 1 | The code or symbol at shutdown | Points to overheating, voltage, controls or a timer |
| 2 | Cookware and pan placement | Rules out a pan the zone can't use well |
| 3 | Control panel condition | A wet panel or hot pan near the controls can stop a zone |
| 4 | How it was used: empty pan, oil on high, long time untouched | Rules out a protective shutdown that worked as designed |
| 5 | Power sharing between zones | A zone dropping power when another is turned up can be normal |
| 6 | Ventilation under the cooktop and the cooling fan | Poor airflow lets the electronics overheat |
| 7 | Supply voltage at the cooktop | Voltage outside the normal range triggers protection |
| 8 | Internal fan, temperature sensors and power boards | Tested once the above are ruled out |
Manufacturers describe several of these protections directly. Bosch's induction error code page lists codes for a zone that overheated and switched off, for electronics that overheated, for hot cookware near the control panel, for incorrect supply voltage, for a wet panel or objects on it, and for a zone left on for an extended time without interaction. Miele explains that its cooktops have a maximum total power that's shared between zones, and that overheating protection can activate with an empty pan, oil on high power, insufficient ventilation underneath, or a hot zone turned back on after a power outage. Whirlpool adds that poor ventilation can cause the cooktop to overheat and shut down.
Tools you may see
- •A magnet, for a quick cookware check.
- •Multimeter, for supply voltage at the cooktop's terminal block, used by a trained technician.
- •The installation instructions, to check required ventilation openings and clearances.
- •The cooktop's diagnostic or fault memory, on models that have one, to see repeated codes.
Questions you'll probably be asked
- •What code or symbol appears when it stops?
- •Which zone, which pan, and what power level?
- •Was another zone running at a high setting at the same time?
- •Does it happen with an empty pan, with oil, or with long simmering?
- •What's below the cooktop, and is there an opening for air?
- •Did it start after installation, a remodel or a power outage?
What the findings usually mean
- •Overheating code after high heat or an empty pan: the protection worked as designed.
- •Power drops when another zone is turned up: power sharing, not a fault.
- •Wet-panel or timer code: the controls or the time limit stopped the zone; no part has failed.
- •Overheating at normal settings, poor ventilation: an installation issue; the cooktop needs the airflow its instructions call for.
- •Voltage code: the home's supply; Bosch directs owners to their utility or Bosch support.
- •Codes return with good airflow and supply: the cooling fan, a temperature sensor or a power board.
Radiant glass cooktops work differently; see what a technician checks when a glass cooktop element won't heat.
Sources
- •Bosch Induction Cooktop Error Codes, Bosch
- •Power drops of its own accord, Miele
- •Not Operating Correctly, Induction Cooktop, Whirlpool Product Help
Good to know: Many induction shutoffs are the cooktop protecting itself, so the code matters more than the fact that it stopped.
Call TrueFix San Antonio at (210) 401-3007 for cooktop repair, or see our Bosch repair page for that brand.