Bosch · Dishwasher
E09 Heating circuit / heat pump fault
What this code means
E09 is part of the same heating-circuit failure family as E01 — the water isn't reaching wash temperature. A flow-sensor issue can be a secondary contributor, but the core fault is the heating circuit itself.
Most likely causes
- Failed heating element / heat pump component
- Flow sensor buildup affecting heating performance
- Wiring fault to the heating circuit
What to try first
Not user-serviceable — heating circuit diagnosis needs a technician, same as E01.
Safety note: if this code returns after one clean reset, stop resetting it — repeated lockouts usually mean a real fault that needs a licensed technician. Never bypass a safety switch.
FAQ
What does Bosch error code E09 mean?
Heating circuit / heat pump fault. E09 is part of the same heating-circuit failure family as E01 — the water isn't reaching wash temperature. A flow-sensor issue can be a secondary contributor, but the core fault is the heating circuit itself.
Can I fix Bosch code E09 myself?
Usually not. Not user-serviceable — heating circuit diagnosis needs a technician, same as E01. If the code returns after one reset, it needs a licensed technician.
What causes Bosch code E09?
The most common causes are: failed heating element / heat pump component; flow sensor buildup affecting heating performance; wiring fault to the heating circuit.
Other Bosch dishwasher codes
All Bosch dishwasher error codes →
Other dishwasher brands: Whirlpool · KitchenAid · Samsung · GE · LG · Maytag · Frigidaire · Generic · Electrolux · Kenmore
This information may contain errors or not apply to your exact model — always double-check it against your appliance's own manual before acting. If there's any chance of a gas, fire, electrical, carbon monoxide, or other safety hazard, stop and call a licensed professional or the appropriate agency (e.g. your gas utility) instead of relying on this page alone.