Induction Hob Error Codes Explained: What They Mean and What to Do
When an induction hob displays an error code, it is communicating that its internal self-diagnostic system has detected a problem. This is critical: error codes are not standardised across brands. The same code can mean completely different things on a Bosch, a Miele, an AEG, or a budget model. The only reliable source for what a specific code means on your hob is the installation or user manual for that exact model.
Before acting on any error code, switch the hob off at the mains. Do not attempt to open the appliance or inspect internal components yourself. Induction hobs operate at mains voltage and contain capacitors that retain dangerous electrical charge even after being unplugged.
If you are in any doubt about what a code means, or if the hob is showing signs of burning, unusual noise, or physical damage, stop using it and contact either the manufacturer’s support team or a qualified appliance engineer before proceeding.
Why error codes vary so much between brands
There is no industry standard for induction hob error codes. Each manufacturer defines its own diagnostic system independently, which means the same alphanumeric code can indicate entirely different faults on different appliances. Research across major brands makes this clear in stark terms:
Bosch’s official support documentation for induction hobs lists codes like F1/F6 (cooking zone overheated), F2/F4 (electronics overheated), E9000/E9010 (supply voltage outside operating range), and U1/U2/U3 (voltage or overheating issues), with a generic “E or F” catch-all requiring the user to press and hold the zone button to reveal the full code. Miele uses an entirely different system: Err039, Err040, Err408, Err412 (electronic module faults), Err044 (overheating protection), and Err047–049 (fan issues). AEG uses E0 for an interface configuration error and E4 for a temperature sensor coil defect. Electrolux documents E2 as an LED lighting fault on induction hobs, not an overheating alert. Thermador uses E8 for fan failure; other brands use E6 or E5 for the same component.
Even within a single brand, codes can differ between model ranges and manufacturing years. A code that meant one thing on a 2018 model may not apply to a 2023 version of the same brand.
Generic error code tables, including anything that claims to list “common induction hob codes” without specifying the exact brand and model, should be treated as rough orientation only. Acting on a misidentified code could lead to unnecessary expense, incorrect repairs, or unsafe use of a faulty appliance. Always verify with your specific manual or the manufacturer’s official support resources before taking action beyond a basic power cycle.
What categories of fault do error codes cover?
While the specific codes vary by brand, the faults that induction hobs monitor and report fall into a consistent set of categories. Understanding what these categories are helps you make sense of an error code even before you have found its exact meaning in your manual. It also helps you have a more informed conversation with an engineer if one is needed.
Pan detection / cookware
The zone was activated but the hob could not detect a compatible pan, or the pan lost contact during use. This is one of the most common and most benign causes of an error code.
Examples: Bosch flashing heat indicator, Samsung underlined ‘u’, AEG E1
Overheating / thermal protection
An internal temperature sensor has detected that a component (the coil, the electronics, or the glass surface) has exceeded a safe operating temperature. The hob shuts down to protect itself.
Examples: Bosch F1/F2/F4, Miele Err044, Thermador E1/E3, Whirlpool C2/C3
Power supply / voltage
The mains voltage is outside the hob’s acceptable operating range: either too high or too low. This can be caused by grid events, circuit overloading, or a fault in the property’s wiring.
Examples: Bosch E9000/U1, Thermador E3/E4, AEG E3/E5, Fisher & Paykel U400
Cooling fan
The fan responsible for cooling the electronics has stopped rotating, is running too slowly, or the vents are blocked. Without cooling, the hob cannot operate safely.
Examples: Miele Err047–049, Thermador E8, various brands E5 or E6
Sensor fault
A temperature sensor (typically an NTC thermistor) has failed or is returning an implausible reading. The hob shuts down because it cannot verify its own temperature status.
Examples: Thermador E2/E7, Electrolux E2 (on some models), AEG E4, Duxtop E4
Control panel / communication
A fault in the touch control panel, a communication failure between the panel and the main control board, or moisture/contamination on the panel surface causing erroneous inputs.
Examples: Bosch flashing ‘e’ (wet panel), Samsung F0/F1/F2, AEG E6/E9
Child lock / settings states
Not always a fault. Some display indicators (L, C, a lock symbol) indicate that the child lock or a timer function is active rather than signalling a genuine error condition.
Examples: Bosch key symbol, Siemens L symbol, Samsung d0 (stuck button)
Internal / board fault
A fault in the main electronic control board, the induction module, or internal communications. These codes almost always require a qualified engineer rather than user intervention.
Examples: Miele Err039/Err040/Err408, Bosch E7010, AEG E6/E7/E8/E9
How to find what your specific error code means
Before doing anything else, write down the exact code shown on the display, including every digit and letter. On some hobs (particularly Bosch and Siemens models), the initial display shows only “E” or “F” and requires you to press and hold the relevant zone button to reveal the full code. Note what you were doing when the code appeared, and whether it appeared at startup or during use.
Then work through the following in order:
Check the user manual for your exact model
The paper or digital manual supplied with your hob is the authoritative source for what each code means on that specific appliance. Look for a section titled “Error codes”, “Fault codes”, or “Troubleshooting”. If you no longer have the paper manual, most manufacturers provide PDF versions on their support websites. Search for your brand name and model number followed by “user manual” or “instruction manual”.
Visit the manufacturer’s official support website
Most major brands maintain online support resources that include error code databases and troubleshooting guides specific to individual models. Search for your brand name plus “induction hob error codes” or “fault codes” to find the relevant support page. For CATA hobs, documentation is available through the CATA product support page.
Contact the manufacturer’s customer support team
If the manual or online resources do not clearly explain your code, contact the manufacturer directly. Have your model number, serial number, and the exact code ready before calling. Manufacturer support teams can usually confirm the meaning of any code for your specific model and advise whether it requires service.
Contact a qualified appliance engineer
If you cannot find the manual or manufacturer support is unavailable, a qualified appliance engineer who works on your brand will have access to service documentation and diagnostic tools that are not available to the general public. This is also the appropriate step if the manual identifies the code as requiring professional attention.
The table below illustrates how dramatically the same code can differ across brands. It reinforces why brand-specific documentation is the only reliable source.
| Code | Brand | What it actually means |
|---|---|---|
| E2 | Electrolux (some models) | Error in LED lighting |
| E2 | Thermador | Temperature sensor of the cooking zone has failed |
| E2 | Fisher & Paykel | Overheating of a cooking zone |
| E2 | Duxtop | High voltage: use stabiliser or wait for voltage to normalise |
| E4 | AEG | Temperature sensor coil defect |
| E4 | Thermador | Connection between power board and display board interrupted |
| E4 | Nuwave | Overheating: allow to cool, remove hot cookware |
| F1 | Bosch (official) | Cooking zone overheated: switched off to protect work surface |
| F1 | Samsung | Communication error |
| E6 | Miele | Not documented under E6; Miele uses Err-series codes |
| E6 | Thermador | Power board has failed: contact customer service |
| E6 | Nuwave | Fan error: fan may be blocked or defective |
What to do when an error code appears: safe first steps
Regardless of the code shown, the same safe sequence applies before doing anything else.
Stop cooking immediately and remove pans from the hob surface. Switch the hob off using its own controls, then switch it off at the mains: either via the circuit breaker in your consumer unit or by removing the plug if it is a 13A plug-in model. This is important because using the panel button alone does not always fully power down the control board.
Do not attempt to open the appliance, inspect internal components, or touch any wiring. Induction hobs contain high-voltage capacitors that retain dangerous charge even after the appliance is disconnected from the mains. Internal inspection must only be carried out by a qualified appliance engineer.
If the code was accompanied by a burning smell, unusual sound, visible sparking, or discolouration of the glass surface, do not restart the hob. These signs indicate a serious fault. Leave the appliance switched off and contact the manufacturer’s service team or a qualified engineer before using it again.
If the code appeared without any of those warning signs (during normal use or at startup) and the hob appears otherwise undamaged, it is reasonable to attempt a power cycle (described in the next section) and consult the manual for guidance.
How to reset an induction hob after an error code
A full power cycle is the appropriate first response to most error codes that are not accompanied by signs of physical damage or burning. It clears transient faults: those caused by brief power supply events, temporary overheating, or momentary sensor anomalies. It also resets the control board to a normal operating state.
Switch off at the consumer unit, not just the hob’s panel
Locate the circuit breaker for the hob’s circuit in your fuse box and switch it off, or remove the plug if it is a 13A model. The hob’s own panel button does not fully reset the control board on most models.
Wait at least two minutes
Allow any residual charge in the control board’s capacitors to dissipate fully. For codes that may relate to board faults, five minutes is preferable to ensure a complete reset.
Restore power and allow the startup sequence to complete
Switch the circuit breaker back on. The hob will run through its initialisation routine, typically taking five to fifteen seconds. Wait for the display to settle before attempting to use any zones.
Observe carefully during the next use
If the code does not reappear immediately and the hob functions normally for a complete cooking session, the fault was likely transient. If the same code reappears immediately at startup or during the next use, the underlying condition has not resolved itself. Consult the manual or contact a qualified engineer.
Understanding the common fault categories in more detail
Pan detection and cookware faults
Pan detection codes are among the most common and the most straightforward to resolve. Induction hobs check for a compatible pan within a few seconds of a zone being activated. If no ferromagnetic baseA material that responds to a magnetic field, such as cast iron or magnetic stainless steel. Copper, aluminium, and non-magnetic stainless steel will not trigger induction. Test with a fridge magnet: a firm stick confirms compatibility. is detected, the zone cuts power. This happens with incompatible pans, pans too small to cover the zone’s sensor area, and pans with a warped base that intermittently breaks contact. On most hobs these are self-clearing once a compatible pan is placed correctly. Always confirm with your manual that the code your hob is showing is indeed a pan detection code, not something that looks similar.
Thermal protection and overheating faults
When a hob shuts down due to temperature, it has done exactly what it was designed to do. This is not a fault. The most common cause is blocked ventilation. Built-in hobs draw cooling air through vents and require minimum clearances below and around the appliance as specified in the installation manual. If those clearances are not met, or the vents become blocked, the hob cannot cool its electronics adequately during sustained use. Allow the hob to cool fully (at least 15–30 minutes) before restarting. If overheating codes recur regularly at moderate power settings with clear ventilation, the cooling fan may have failed and requires a qualified engineer to inspect.
Power supply and voltage faults
Voltage fault codes indicate the incoming mains supply is outside the acceptable operating range for the appliance. UK mains is nominally 230V, permitted to vary between approximately 216V and 253V. An isolated voltage event such as a brief grid fluctuation will typically clear after a power cycle and not recur. If voltage fault codes appear regularly, this points to a problem with the property’s electrical supply or the circuit feeding the hob: the circuit may be overloaded, wiring may have degraded, or the supply from the grid may genuinely be unstable. A qualified electrician should assess the circuit before the hob is used further. Do not continue using the hob if voltage fault codes recur, as sustained operation outside voltage limits can damage the electronics.
Child lock and settings indicators
Not all codes indicate faults. Many hobs display a symbol or letter to indicate that the child lock is active, typically a padlock icon, the letter “L”, or the letter “C”. This is a user-activated safety feature, not an error. The procedure to deactivate it varies by model: it is commonly a sustained press (three to five seconds) of a specific button or key combination. Your manual will confirm the exact method. Steam from cooking can also trigger accidental lock activation if it lands on the touch panel. Keeping the control area clean and dry during cooking reduces this.
Internal and board faults
Codes relating to internal electronics, communication between boards, induction module failures, or sensor circuit faults are not user-serviceable. If your manual identifies a code as relating to these categories, or if you cannot identify the code and it persists after a power cycle, contact a qualified engineer. Do not attempt to open the appliance. Bosch’s own service documentation confirms that capacitors in induction hob filter boards can remain charged indefinitely and recommends that engineers discharge them with measurement tools before handling internal boards. This cannot be safely done at home.
When to stop and call a qualified engineer
The following situations require a qualified appliance engineer. Do not attempt further troubleshooting or restart the hob in these circumstances.
Call an engineer if: an error code is accompanied by a burning smell, visible discolouration of the glass or surrounds, or any sign of arcing or sparking; if the code does not clear after a full power cycle and the manual identifies it as a component fault; if multiple different codes are appearing in sequence across separate sessions; if the hob trips the circuit breaker repeatedly; or if the hob will not power on at all after a power cycle with no display response.
For hobs still within their warranty period, contact the manufacturer’s service team before arranging any independent repair, as independent repairs may void the remaining warranty. When engaging an independent engineer, confirm they have experience with your specific brand and carry the relevant tools for induction hob diagnostics. Reputable engineers will provide a written quotation before undertaking any repair work.
Induction hobs are not appliances that can be safely opened and inspected at home. They contain high-voltage components and capacitors that retain dangerous charge after disconnection from the mains. Even engineers trained on these appliances follow specific discharge procedures before touching internal boards. The risk of serious electric shock from an undischarged capacitor is real and does not diminish over time after disconnection.
If you are concerned about repair costs, request a written quotation from a qualified engineer before deciding whether to repair or replace the appliance. For complex board failures, the repair cost relative to appliance age and replacement cost is worth evaluating.
Preventing error codes from recurring
Most of the common, user-resolvable error codes can be prevented with a small number of consistent habits. Pan detection errors are almost entirely avoidable with compatible, properly-maintained cookware: pans with a firm magnetic base that covers the cooking zone, kept flat and undistorted with regular use. A fridge magnet test on any new pan before use is a quick and reliable check.
Thermal protection codes are most often caused by blocked ventilation. The clearances specified in the installation manual are not suggestions. They are the minimum required for the cooling system to function correctly during sustained high-power use. If the hob was installed above a drawer or oven, confirm those clearances were observed. Keep the area around the hob’s ventilation slots clear during use.
For voltage-related codes, ensure the hob is on a dedicated circuit and is not sharing a circuit with other high-draw appliances. If you have experienced recurring voltage codes, have a qualified electrician inspect the circuit before continuing regular use.
Keeping the control panel clean and dry during cooking prevents accidental child lock activations and false panel fault codes. Wipe the panel after any steam exposure, and avoid placing items on or near the panel while cooking.
Regular maintenance, including cleaning grease filters if present and keeping ventilation slots free from dust and grease accumulation, extends the life of the cooling system and reduces the frequency of thermally-triggered shutdowns over the appliance’s lifetime.
Frequently asked questions
Because there is no industry standard. The same code means different things on different brands, and sometimes on different models within the same brand. Research across major manufacturers confirms this clearly: E2 is an LED lighting fault on some Electrolux models, a temperature sensor failure on Thermador, an overheating alert on Fisher & Paykel, and a high-voltage warning on Duxtop. Acting on the wrong interpretation could lead you to ignore a serious fault or, conversely, attempt to fix something that is not actually wrong. Your model’s manual or the manufacturer’s support team is the only reliable source.
Search online for your brand name and the model number (usually printed on a label on the underside of the hob or inside the door of the appliance), followed by “user manual PDF”. Most major manufacturers, including Bosch, Siemens, Neff, AEG, Miele, and Samsung, provide PDF manuals on their support websites. If you cannot find it there, appliance manual databases such as Manuals.co.uk or the manufacturer’s international support pages often hold archived documentation. If all else fails, contact the manufacturer’s customer service with your model number and they should be able to send or direct you to a copy.
Contact the manufacturer’s customer support team with your exact model number and the precise code shown. Some codes, particularly longer alphanumeric sequences, are diagnostic codes intended for service engineers rather than end users and are not listed in consumer manuals. The manufacturer’s technical support team or an authorised service engineer will have access to the full service documentation. Do not restart the hob or attempt any intervention if the code is not in your manual and you cannot identify it. Contact support first.
It will clear transient errors: those caused by brief power supply fluctuations, temporary overheating during intensive use, or a momentary loss of pan contact. These account for a meaningful proportion of error codes in normal domestic use, particularly the overheating and voltage categories. However, a power cycle will not resolve a genuine component fault. If the same code reappears immediately after restarting, or returns within the next cooking session, the underlying condition is ongoing and needs to be investigated via the manual or with a qualified engineer.
If the code appeared once, cleared after a power cycle, and the hob has shown no unusual behaviour since (no burning smell, no unusual noise, no recurrence), it is generally reasonable to continue using it while monitoring carefully. If the code recurs, or if you cannot identify what it means, stop using the hob and consult the manual or a qualified engineer. It is never safe to continue using a hob that is displaying codes accompanied by burning smells, physical damage, or electrical tripping.
Some user-resolvable causes are appropriate for users to address themselves: placing a compatible pan correctly, deactivating a child lock, clearing blocked ventilation slots, or waiting for the hob to cool after an overheating event. None of these require opening the appliance. Any code that requires opening the hob, inspecting internal components, or replacing parts must be addressed by a qualified appliance engineer. Induction hobs contain high-voltage capacitors that retain dangerous charge after disconnection from the mains. This risk cannot be safely managed without specialist tools and training.
Standard UK consumer electronics warranties are typically one to two years from the date of purchase, though some manufacturers offer extended warranties. Check your original purchase receipt or the warranty card supplied with the appliance. If you registered the product with the manufacturer at the time of purchase, they will usually have a record. Always contact the manufacturer’s service team before arranging an independent repair if the appliance may still be under warranty, as independent repairs can void the remaining coverage.
Summary
Induction hob error codes are a valuable diagnostic tool, but only if you know what they mean on your specific appliance. There is no universal standard: the same code can indicate completely different faults across different brands and models. The only reliable source for interpreting your code is the user manual for your exact model or the manufacturer’s official support resources.
When a code appears: switch off at the mains, note the code precisely, check the manual, and perform a power cycle if appropriate. Do not open the appliance or attempt internal repairs under any circumstances. If the code is accompanied by burning smells, physical damage, or electrical tripping, or if it persists after a power cycle and you cannot identify its cause, contact a qualified appliance engineer before using the hob again.
For CATA hob support and documentation, visit the CATA product support page. For general guidance on induction hob installation, maintenance, and troubleshooting, explore the CATA hob guides and advice section.
Explore More Kitchen Advice & Buying Guides
Browse our latest articles covering appliance tips, energy-saving advice, and expert guidance – designed to help you choose, use, and get the most from your kitchen appliances.
