Error code
Bosch Dishwasher Error Code E09
Bosch Dishwasher E09 usually means the dishwasher is not heating water properly. Check the safe external items first, then stop if the code returns or there is leaking, burning smell, or poor heating.
Quick answer
E09: what does it mean and how to fix
What does it mean?
the dishwasher is not heating water properly.
How to fix first
Switch the dishwasher off and let it cool if it has been running.
Why is this happening?
Heating circuit or heat pump fault
When should I call an engineer?
Call a dishwasher engineer if the code returns after safe checks, water appears under the appliance, heating is affected, the pump is noisy or jammed, or diagnosis would require access inside the cabinet.
What does this error code mean?
Bosch dishwasher error code E09 usually means the dishwasher has detected a heating fault. On many Bosch models this can involve the heat pump or heating circuit, which is not a user-serviceable repair.
You can check simple external causes such as the programme selected and whether the dishwasher is otherwise draining correctly, but do not open the cabinet or test heater wiring.
E09 usually points to the dishwasher heating path, including the heater, heat pump assembly on some models, wiring, and control readings.
Symptoms users may notice
- Dishes may finish cold, wet, or poorly dried.
- Grease may remain on dishes because wash water is not hot enough.
- E09 may return after the heating stage of the programme.
Why is this happening?
- Heating circuit or heat pump fault
- Control not detecting the expected temperature rise
- Internal wiring or heater-related component fault
What this usually points to
E09 usually points to the dishwasher heating path, including the heater, heat pump assembly on some models, wiring, and control readings.
How to fix this safely
- Switch the dishwasher off and let it cool if it has been running.
- Check that the selected programme should use heat and that the cycle is not being interrupted by a drain fault.
- Try one normal programme only if there is no smell, leak, or electrical concern.
- Call an engineer if E09 returns or dishes remain cold and wet.
Can I fix this myself?
MaybeYou can carry out simple external checks such as filters, hoses, visible water, and correct loading. Stop when the fault points to internal pumps, heaters, wiring, or controls.
Safety boundary: Disconnect power before accessible checks. Do not remove panels, bypass safety devices, work on wiring, or run the dishwasher if water may be reaching electrical parts.
What not to do
- Do not keep repeating resets if the same code comes back.
- Do not remove panels or work on internal wiring, pumps, valves, or heater parts.
- Do not ignore leaks, burning smells, or unusual pump noises.
Reset steps
- Restore power only after the safe external checks are complete and the area is dry.
- Run one short test programme if there is no visible leak, smell, or electrical concern.
- Stop if the code returns or the dishwasher fails to fill, heat, drain, or wash normally.
Intermittent vs persistent faults
A one-off warning may clear after safe external checks, but repeated Bosch dishwasher faults should be treated as a persistent problem that needs diagnosis.
When to call an engineer
Call a dishwasher engineer if the code returns after safe checks, water appears under the appliance, heating is affected, the pump is noisy or jammed, or diagnosis would require access inside the cabinet.
Safety warning
Disconnect the dishwasher from power before checking accessible filters, hoses, or seals, and do not remove panels or work on internal electrical, pump, heater, or valve parts yourself.
Useful hub links
Related heating fault codes
Bosch Dishwasher Error Code E01
the dishwasher has detected an electronic control fault.
Bosch Dishwasher Error Code E19
a dishwasher valve or heat-exchanger related component may not be operating correctly.
Bosch Dishwasher Error Code E29
the dishwasher has detected an internal power, control, or supply-related fault.
Bosch Dishwasher Error Code E15
The dishwasher anti-flood system has been triggered
Relevant guide
Frequently asked questions
What does Bosch dishwasher E09 mean?+
Bosch Dishwasher Error Code E09 usually means the dishwasher is not heating water properly.
How do I fix Bosch dishwasher E09?+
Start with safe external checks only: switch off power, inspect filters, hoses, water around the base, and the visible wash cabinet as relevant. If the code returns, arrange diagnosis.
Can I still use a Bosch dishwasher with E09?+
Do not keep using it normally while the code is showing. One short test is only reasonable after safe checks and only if there is no leak, smell, or electrical concern.
Model variation note
Bosch dishwasher code wording can vary by model. Use the exact model manual where available, and keep checks to safe user-accessible areas.