Why Does My Induction Hob Keep Switching Off Mid-Cook?
An induction hob that keeps switching off mid-cook is almost always responding to one of a small number of built-in safety or detection systems — not developing a fault. The most common causes are incompatible or poorly positioned cookware, overheating due to blocked ventilation, automatic power sharing across zones, or a child lock or timer that has been activated without the user realising. Most can be resolved in a few minutes.
Quick symptom checker
Select the description that best matches what your hob is doing. Each option points to the most likely cause and what to try first.
Induction hobs check for a compatible pan within a few seconds of activation. If no suitable pan is detected, the zone shuts off automatically to avoid wasting energy. This happens if the pan is not induction-compatible, if the base does not fully cover the zone, or if the pan has a warped base that breaks contact with the glass.
After sustained high-power use, the hob’s internal temperature sensors trigger a protective shutdown. The hob will not restart until it has cooled sufficiently — typically 10–30 minutes depending on how hot it became.
When multiple zones are active simultaneously, many induction hobs automatically redistribute available power. A zone running on boost or high power may cause an adjacent zone to reduce or pause temporarily to stay within the hob’s total power budget.
A complete shutdown with a blank display is often a child lock activation, a programmed timer that has elapsed, or a brief power supply interruption that has caused the hob to reset. Some hobs also enter a standby-lock state if no interaction is detected for a set period.
When water boils vigorously, the base of a lightweight pan can vibrate slightly off the glass surface, momentarily breaking the magnetic contact needed for detection. The hob cuts out when it loses the signal. This is also sometimes a power-sharing response to a second zone activating.
An alphanumeric code shown before or after shutdown indicates the hob’s self-diagnostic system has identified a specific condition. Common codes relate to overheating (often E0, E1, or E5 series depending on brand), sensor faults, or supply voltage issues. The exact meaning varies between manufacturers.
The most common causes explained
The six causes below cover the vast majority of induction hob mid-cook shutdowns. They are ordered by how frequently they occur in normal domestic use.
Incompatible or poorly positioned cookware
Induction hobs work by generating a magnetic field beneath the glass surface. When a ferromagneticA material that responds strongly to a magnetic field. Cast iron and magnetic stainless steel are ferromagnetic. Copper, aluminium, and most non-magnetic stainless steel are not. pan is placed on the zone, the field induces an electrical current in the pan’s base, which generates heat. If no suitable pan is detected within a few seconds of the zone being activated, the hob cuts the power to that zone automatically.
This can happen with a pan that appears induction-compatible but is not — some stainless steel pans have a weaker magnetic base than others and may only be partially detected. It also happens when the pan base is too small to cover enough of the zone’s detection coil, or when a pan with a warped or bowed base fails to make consistent contact with the glass.
Test the pan with a fridge magnet: a firm stick confirms compatibility. Try a different pan that you know works. If the zone consistently shuts off with multiple pans, the coil or detection circuitry may need inspection.
Thermal overheating protection
Induction hobs contain temperature sensors that monitor the internal electronics and the glass surface. If the temperature exceeds a safe threshold, the hob triggers a protective shutdown to prevent damage to the components. Unlike a gas hob, the heat generated by an induction hob is largely in the pan rather than the appliance itself, but sustained high-power operation still generates significant heat in the coils and control circuitry beneath the glass.
The most common cause of thermal shutdown is blocked ventilation. Built-in induction hobs draw cooling air through vents, typically at the front or rear. If these are covered by a tea towel, obstructed by items placed too close to the hob, or if the clearance beneath the hob does not meet the manufacturer’s specification, the cooling system cannot dissipate heat quickly enough. Hobs installed above ovens or drawers with inadequate air gap are particularly susceptible.
Ensure all ventilation slots around the hob are clear. Check the installation manual for the required minimum clearance beneath the hob — often 5–10mm above a drawer or oven. Allow the hob to cool for 15–30 minutes before restarting. If thermal shutdowns occur regularly at moderate power settings, the cooling fan may have failed and should be inspected by a technician.
Automatic power sharing across zones
Most induction hobs, particularly hardwired models, have a maximum total power output shared across all zones. When the sum of power requested across active zones would exceed this limit, the hob’s power management system automatically reduces or pauses one or more zones to stay within budget.
This is most noticeable when using the boost or maximum power setting on one zone while other zones are also running at high settings. The hob may briefly pause a zone or reduce its output to maintain the total within safe limits. Zones that share the same underlying power circuit — often zones on the same side of the hob — are more likely to affect each other.
Reduce the power level on one or more zones. Avoid using the boost function on multiple zones simultaneously. Consult the manual to identify which zones are on the same power circuit — this varies by model.
Child lock or pause function accidentally activated
Touch-sensitive control panels are a convenience feature but also a source of accidental commands. Water from a damp cloth, steam from cooking, food debris on the panel, or a hand resting briefly on the surface can all trigger control gestures. The child lock function in particular is commonly activated without the user noticing — it typically shows a small lock symbol on the display and prevents any zone adjustment. Some hobs also have an auto-pause feature that activates if no interaction is detected for a set period while zones are running.
Check the display for a lock or key symbol. Consult the manual for the deactivation method — usually a sustained press (three seconds or more) of a specific button or the lock icon itself. Keep the control panel area clean and dry during cooking. If the panel is frequently triggering accidental inputs, ensure steam from pans is not being directed onto the control area.
Pan loses contact during vigorous boiling
When water boils at high power, the turbulence can cause a lightweight pan to vibrate slightly, particularly if the pan has a thin or slightly domed base. Even momentary loss of contact between the pan’s magnetic base and the glass surface is enough for the hob’s detection circuit to cut power to that zone. The hob may restart immediately if the pan resettles, giving the impression of intermittent cutting out rather than a complete shutdown.
Use a heavier-based pan, particularly for high-power boiling — cast iron or quality stainless steel pans with a thick, flat base maintain contact more reliably. Once boiling is achieved, reduce power slightly to a steady simmer, which eliminates the vibration and uses less energy.
Timer or programmed auto-off
Most induction hobs include a zone timer that can be set to automatically turn off a zone after a specified duration. If this has been set intentionally and forgotten, or set accidentally, the zone will cut off at the end of the programmed time. Some hobs also have a maximum continuous runtime per zone — typically 60–99 minutes — after which the zone turns off as a safety measure regardless of whether a timer was set.
Check the display for any timer indicators — often a small clock symbol or countdown figure. If a timer is set, cancel it via the controls described in the manual. If your hob has a maximum runtime limit, this is normal behaviour and the zone can simply be restarted.
Check these things first when your hob keeps switching off
Before concluding there is a fault, work through these checks in order. They resolve the majority of cases without any further intervention.
Test the pan with a fridge magnet
Hold a magnet firmly against the centre of the pan’s base. If it sticks with clear attraction, the pan is induction-compatible. A weak or no attraction means the pan will not work reliably. Try a known-compatible pan on the same zone.
Check for a lock symbol on the display
A padlock or key icon means the child lock is active. The hob is not faulty — it is locked. Refer to the manual for deactivation; it is usually a three-second press of a specific button.
Check for a timer running on the affected zone
Look for a countdown or clock symbol near the zone display. If present, the zone is set to switch off when the timer expires. Cancel the timer or allow it to elapse and restart.
Check the ventilation clearance around the hob
Look at the sides, front, and rear of the hob for ventilation slots. Ensure nothing is blocking them. If the hob is built in above a drawer or oven, check the installation manual for the required clearance distance below the hob.
Note any error code shown on the display
If a code appeared before or during the shutdown, write it down exactly. Look it up in the user manual under “error codes” or “fault codes”. The code tells you what the hob detected and is the fastest route to the correct fix.
Try a different zone with the same pan
If the problem is isolated to one zone but other zones work normally with the same pan, the issue is most likely with that specific zone’s coil or detection sensor rather than with the pan or power supply.
Why does my induction hob keep switching off when boiling?
This is a specific and common complaint. Boiling at maximum power on an induction hob creates two conditions that can each cause a zone to cut out independently, and sometimes both at once.
The first is pan contact loss. At maximum boil, turbulent water causes vibration in the pan — especially in lightweight pans with a thin base — that can momentarily break the magnetic contact between the pan and the glass. The detection circuit senses the loss of contact and cuts the zone. The hob may restart within seconds when the pan settles, producing a pattern of the zone cutting in and out repeatedly during hard boiling.
The second is power sharing. If another zone is active simultaneously, the hob may reduce power to the boiling zone to keep the total output within limits. This looks like the boiling zone cutting out but is actually a managed reduction in power.
Both issues are resolved by the same approach: use a heavy-based pan, reduce the power setting slightly once boiling is achieved (a rolling boil requires less power than reaching boiling point), and avoid running multiple zones at maximum power simultaneously.
Understanding induction hob error codes
When an induction hob shuts down and displays an alphanumeric code, it is communicating the specific reason for the shutdown through its built-in self-diagnostic system. These codes vary between manufacturers, so there is no universal reference — but the categories of fault they represent are consistent.
Codes in the E0–E2 range typically indicate overheating conditions — either the glass surface has exceeded its temperature limit or the internal electronics have reached thermal shutdown. Codes in the E3–E5 range commonly relate to supply voltage issues: the incoming mains voltage is outside the acceptable range for the appliance, which can cause erratic shutdowns during normal use. Codes showing “F” prefixes often indicate fan or cooling system faults. Codes with numbers like 88 or dashes across all displays usually indicate a startup error or a communication fault between the control board and the cooking zones.
The user manual for your specific model will list the codes and their meanings. If the manual is unavailable, searching online for the brand name, model number, and the exact code shown will generally return the manufacturer’s documentation or a reliable forum thread. Persistent codes that return immediately after the hob is switched back on, or codes that change between incidents, should be investigated by a qualified appliance technician.
For more detail on common error codes across induction hob brands, the CATA hob guides cover troubleshooting in more depth.
When to call a technician
Most induction hob switching-off issues are resolvable through the checks described above. The following situations indicate a more serious problem that warrants professional inspection rather than further DIY troubleshooting.
If the hob shuts down with a persistent error code that reappears immediately after restart, the hob has identified a specific component fault that is not a transient protection event. If the hob shuts down and will not power on at all — with no display response — the issue may be with the main control board or the power supply connection. If you notice a burning smell, discolouration of the glass, or any indication of electrical arcing around the hob or its connections, stop using the appliance immediately and contact a qualified technician or the manufacturer’s service team.
Induction hobs contain high-voltage capacitors that retain charge even after the appliance is unplugged. Internal repairs should only be carried out by a qualified appliance engineer. If your hob is within its warranty period, contact the manufacturer’s service team before attempting any repair — independent repairs can void warranty coverage.
Frequently asked questions
The most likely cause is overheating: the hob’s thermal sensors have detected that the internal temperature has reached a safe shutdown threshold. This is most common when ventilation is restricted, when the hob is used at high power across multiple zones for an extended period, or when the clearance beneath the hob does not meet the manufacturer’s specification. Allow it to cool for 15–30 minutes, then check that all ventilation slots are clear before restarting.
Two things can cause this. At high boil power, a lightweight pan can vibrate enough to break the magnetic contact with the glass, causing the zone to cut out when the hob briefly loses detection of the pan. Separately, if another zone is also active, the hob’s power management may reduce or pause the boiling zone to stay within its total power budget. Using a heavier-based pan and reducing power slightly once boiling is achieved resolves both issues in most cases.
If the hob cut out during use and now shows no display response, first check whether the fuse in the consumer unit for the hob’s circuit has tripped. Reset it and try again. If the fuse is fine but the hob still does not respond, check whether a child lock is active — some models lock the entire panel including the power button. If neither resolves it, the hob may need technical inspection. Check whether the shutdown was accompanied by an error code, which would indicate what the hob detected before cutting power.
If only one zone is affected and other zones work normally with the same pan, the issue is most likely with that specific zone’s induction coil or detection sensor rather than the pan, power supply, or general power management. Try the pan on a different zone to confirm. If the problem is consistently isolated to one zone and persists across different pans, contact a qualified technician to inspect the coil.
The child lock feature has been activated. This disables all touch controls including zone adjustments and the power button. It is commonly triggered accidentally by water on the panel, steam from cooking, or a hand resting on the surface. To deactivate it, press and hold the lock icon or the designated lock button for three to five seconds — the exact method varies between models, so consult the user manual for your specific hob if a brief press does not work.
In almost all cases, no. The shutdown is itself the safety feature — the hob cutting power when it detects an anomaly is the correct behaviour. The exceptions that do warrant attention are shutdowns accompanied by burning smells, visible damage to the glass or control panel, or error codes that persist and reappear after restart. These indicate the hob has detected something beyond a normal protection event and should be inspected before further use.
Yes. Induction hobs are sensitive to supply voltage. A brief power interruption, a voltage dip during a high-demand period on the local grid, or a fluctuation caused by another high-draw appliance on the same circuit can all cause the hob to cut out and reset. If your hob switches off unexpectedly and restores its default settings (such as clock resetting), a power supply event is the likely cause. If this happens regularly, an electrician can check whether the dedicated circuit is performing correctly.
Summary
An induction hob switching off mid-cook is almost always a built-in protective response rather than a fault. The most common causes are pan detection failure (incompatible or poorly positioned cookware), thermal overheating from blocked ventilation, automatic power sharing across zones, an accidentally activated child lock or timer, pan contact loss during vigorous boiling, or a programmed auto-off timer.
Work through the six-step check list above before assuming a fault: test the pan, check the display for a lock symbol or timer, verify that ventilation is unobstructed, and note any error code. The majority of cases are resolved by one of these checks. If shutdowns persist with no identifiable cause, or if the hob will not restart after cooling, contact a qualified appliance technician.
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