Bosch · Dishwasher

Bosch dishwasher E09 code

ErrorE09

E09 is listed by Bosch support as internal heat-pump heater fault. The exact checks and component layout can vary by model and region.

✓

Source-linked guidance reviewed against Bosch US dishwasher error codes.

Open official source ↗

✓

What the code means

Internal heat-pump heater fault

Do not open fixed panels or test live electrical parts. Record the full model number and arrange qualified service if the code returns after the permitted external checks.

Typical symptoms

01Wash water may remain cold

02Grease removal and final drying are poorer than normal

03The cycle may stop and show E09

Likely causes

Start with the least invasive explanation and stop if the check requires internal electrical or sealed-system access.

01Internal heat-pump heater fault

Safe next steps

1
Press ON/OFF to stop the dishwasher; do not remove fixed panels
Follow the exact model manual where access or reset steps differ by product series.
2
At the household breaker, switch dishwasher power off for 30 seconds
Follow the exact model manual where access or reset steps differ by product series.
3
Restore power and start one short rinse cycle
Follow the exact model manual where access or reset steps differ by product series.
4
If E09 returns, stop the cycle: the internal heat-pump heater needs Bosch-authorized diagnosis and is not a safe DIY repair
Follow the exact model manual where access or reset steps differ by product series.

When to stop

Stop if you see damaged wiring, smell burning, find an active leak, suspect gas or refrigerant, or need to remove a sealed electrical cover. Use a qualified appliance technician.