Bosch Dishwasher E09 Error: Heat Pump Failure
What Does Bosch Dishwasher Error Code E09 Mean? Error code E09 on a Bosch dishwasher indicates a failure in the heating circuit or heat pump assembly. This component is responsible for heating wash water and providing heat for the drying cycle. When it fails, the dishwasher cannot clean effectively. Common Causes The most common cause […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. The dishwasher can run but will not sanitize dishes. Use only for lightly soiled items and avoid using for baby bottles or items requiring sterilization.
Can I reset the code?
No. E09 typically indicates a hardware failure. A reset may temporarily clear the display, but the error will return when the heater is called to activate.
When to stop immediately?
Stop if you notice: Water remains cold during every cycle, Error returns immediately after reset.
Symptoms You May Notice
Water never heats up during cycle
Dishes come out with food residue because wash water remains cold throughout the program.
Poor drying performance
Dishes are soaking wet at the end of the cycle — the drying phase produces no heat.
Error code appears at cycle start
E09 displays early in the wash program when the heater should activate.
Possible Causes
Failed heat pump assembly
The integrated heat pump that heats and circulates water has failed internally.
Requires ProfessionalBurned-out heating element
The resistive heating element within the heat pump has developed an open circuit.
Requires ProfessionalControl board fault
The power output circuit on the main board that drives the heat pump has failed.
Requires ProfessionalSafe Checks You Can Do
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1
Power cycle the dishwasher
Turn off the circuit breaker for 2 minutes, then restore power and attempt a normal wash cycle.
E09 occasionally appears after a power surge and can be cleared with a reset.
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2
Run hot water before starting
Run the kitchen sink hot water tap until fully hot before starting the dishwasher.
This won't fix the error but may help cleaning performance while awaiting repair.
When to Call a Professional
Contact a qualified technician if:
- Heat pump shows no continuity on multimeter test
- Error persists after power reset
- Control board relay clicks but no heat is produced
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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