The short answer
E9000 means the supply voltage is incorrect and outside the normal operating range, as the table records. The cooktop is reporting on the electricity reaching it, not on anything it has done. That makes this one of the few appliance codes where the cause is usually in the house, and where an electrician is a better first call than an appliance technician.
Code table
Reference| code | meaning | owner-checkable |
|---|---|---|
| E9000 | The supply voltage is incorrect. It is outside the normal operating range. | partly |
| E8208 | The electronics have overheated. The corresponding cooking zone has switched off. | see page |
| E9010 | The supply voltage is incorrect. It is outside the normal operating range. | see page |
What you observe
- The cooktop shuts down and refuses to restart — The control will not run power stages on a supply it does not trust.
- Lights elsewhere in the house dim at the same moment — Corroboration that the problem is the supply rather than the appliance.
- NEAR MISS — one zone misbehaves and the rest are fine — A single-zone fault is not a supply problem; supply faults take everything.
Likeliest causes first
- Shared-circuit loading — First: the cooktop is a heavy load, and if it shares a circuit with other heavy appliances the supply sags each time one of them starts.
- A loose terminal at the appliance connection — Second: a poor connection drops voltage under load and heats up doing it, which makes it both a fault and a hazard.
- A supply problem at the property — Last in order but not in seriousness: if lights dim across the house, the incoming supply itself needs looking at.
Check in this order
- Note whether anything else in the house misbehaves — Dimming lights or other appliances tripping point firmly at the supply.
- Note what else was running at the moment it happened — A pattern tied to one other appliance names the circuit.
- Have the supply and the connection measured under load — This is an electrician’s measurement, not an appliance test, and it is the one that settles it.
Owner-safe steps
- Switch the cooktop off at its breaker and leave it off — Power electronics fed outside their range are damaged by continued use.
About 5 min
- Write down what else was running each time it happened — The pattern is the diagnosis and it costs nothing to collect.
About 10 min
- STOP HERE — do not open the appliance connection box — That is fixed wiring, and it belongs to a qualified electrician.
Safety first
Safety
Unplug the appliance or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. A cooktop holds charge in its filter capacitors after the supply is cut, and the glass cracks if it is levered. Work only with the surface cold and the breaker off.
When to call
Call an electrician first, not an appliance technician: the table says the supply is outside its range, and confirming or clearing that is an electrical measurement at the board and at the connection. If the supply proves sound under load, then the appliance side becomes the question and a technician takes over. Leave the cooktop isolated in the meantime — this is one of the few codes where continuing to use the appliance actively risks damaging it.
Neighbouring codes — E8208 and E9010 sit beside E9000 and name overlapping hardware, so most checks here carry across. Read the two meanings side by side: where they differ in the part named, the order of the checks changes with them.
What this page does not cover
Generalized information: this reads E9000 as the shared Bosch cooktop table records it, so it covers the model lines using that table and no others. Where a page exists for your family or model line, that one is the more specific answer — start there if your model is named. Not here: wiring colours, connector positions and part numbers, which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
