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• On Amica induction hobs a solitary, blinking “E” means the hob cannot detect a suitable pan on the activated cooking zone.
• It clears automatically as soon as a correctly-sized, ferromagnetic pan is centred on the zone.
• If the symbol flashes on every zone despite correct cookware, or appears together with other letters/numbers (EA, E1-E9, etc.), the code changes from a simple “no-pan” warning to an internal fault indication that may require service.
Induction hobs determine whether they may energise a coil by measuring the resonant-frequency shift produced when ferromagnetic metal is placed over the zone:
Pan-detection algorithm
– When a zone key is touched, the control board sends a low-power probe signal through the resonant L-C network that includes the induction coil.
– Presence of a magnetic pan changes the Q-factor and frequency; microcontroller A/D circuitry confirms a valid shift within ~2 s.
– If shift is outside limits (no pan, aluminium/ copper/glass pan, pan bottom too small or off-centre), the microcontroller cuts drive and sets a generic “E” on that zone display.
Typical causes of a blinking “E”
• No pan present.
• Non-magnetic or “sandwich” base with insufficient ferromagnetic layer.
• Bottom diameter below the zone’s minimum (≈ 60 – 80 mm depending on model).
• Pan not centred or heavily warped → air-gap too large.
• Contaminated glass (sugar, water films) reducing coupling.
When it is not only a pan issue
– “E” flashing simultaneously on all zones or alternating with A, 0, or numbers (E2, EA, EF…) → overheating sensor open/short, fan stalled, mainboard-inverter communication loss, or 230 V mains fault.
– Manuals list these specific “E n” codes; they differ from the lone, blinking “E”.
Online service bulletins and user reports (Elektroda forums, 2023-24) confirm that Amica, Ikea-sourced, and many OEM variants still use the plain “E” for pan-absence while reserving Ex/EA for diagnostics. Recent firmware revisions shorten the detection time to ≈1 s to meet EU standby-power regulations and minimise inadvertent heating.
‐ Simple magnet test: if a fridge magnet sticks firmly to the pan base, material is adequate.
‐ Recommended base flatness < 0.5 mm run-out; warped pans can be detected intermittently, causing flicker between power digit and “E”.
‐ Minimum base area is sensed indirectly by induced current; very thick sandwich bases may be seen as “too small” because effective magnetic area is reduced.
Induction hobs contain >400 V DC on the inverter. Removing the glass top or working on the PCB without isolation violates CE safety requirements and may void warranty. Only certified technicians should open the appliance.
‐ Some earlier Amica manuals translate the blinking “E” simply as “Error”. Users therefore confuse it with critical failures; always look for additional characters.
‐ Firmware mapping of codes can vary slightly by production batch—consult the specific service sheet inside the hob for exact meaning of Ex numbers.
‐ Investigate adaptive pan-detection algorithms (gate-drive current spectrum analysis) now appearing in recent IGBT/SiC inverters to allow reliable operation with clad aluminium pans.
‐ Examine integration of NFC tags in cookware for positive identification—prototype work is ongoing in premium hob lines.
A lone, blinking “E” on an Amica induction hob is not an electronics failure—it is the hob’s standard “no or unsuitable pan detected” alert. Use a flat, magnetic pan of adequate diameter and the code will disappear. Only if the symbol persists on all zones or is accompanied by extra letters/numbers does it indicate an internal fault that requires professional attention.