Error code reference

Bosch Dishwasher Error Code E:01

Faulty relay to heat pump heater, or heat/drain pump disconnected or faulty, or low supply voltage/excessive…

Faulty relay to heat pump heater, or heat/drain pump disconnected or faulty, or low supply voltage/excessive voltage drop.

First step from the service manual

Check power cord plug connections at power module and customer outlet - plug cord in securely or replace if faulty.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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