Bosch · Dishwasher · Error code
E09 – Heating fault
The dishwasher has detected a problem heating the water.
Smart summary for E09
This quick AI-style overview sums up how serious this error is, how hard it usually is to fix yourself and roughly how long it takes.
What E09 means
Error E09 indicates that the appliance is not able to heat the water correctly during the cycle.
Common causes
- Failed heating element or heat pump
- Wiring issue to the heater assembly
- Limescale build‑up reducing heat transfer
Quick checks you can do yourself
- Switch off the appliance and unplug it.
- Check that the incoming water supply is not excessively cold.
- Run a short, hot programme and feel the door area after 10–15 minutes to see if any warmth is present.
- If there is no heat at all, further internal testing is usually best left to a qualified engineer.
Always unplug the appliance and switch off power at the mains before removing panels or working near wiring or water connections.
When to call a professional
Because heater and high‑voltage components are involved, heating faults should normally be checked by a professional technician.
Recommended next steps
Using dishwasher salt and occasional descaling products can help protect heating components in hard‑water areas.
Recommended parts & cleaners
The link below searches for compatible parts, hoses and cleaners that may help resolve E09 issues on your Bosch dishwasher. Always check compatibility with your exact model before ordering.
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