Dishwasher stops shortly after starting and displays E02.

Safety first: Turn off power at the breaker and ensure the dishwasher is fully de-energized before removing panels.

• Reset the unit: Cut power for 5–10 minutes, then restore and run a short cycle to see if E02 reappears.
• Check wiring to heater and NTC: Remove the toe-kick panel and side panels (if needed) to access the flow-through heater assembly and temperature sensor. Inspect connectors for corrosion, heat damage, or looseness. Reseat all plugs.
• Measure heater resistance: Using a multimeter on ohms, disconnect the heater and measure across its terminals. Typical Bosch flow-through heaters are around 15–30 Ω (check service data). An open or very low resistance indicates a bad heater.
• Check NTC sensor: The NTC (temperature sensor) is usually integrated in the sump or heater assembly. Measure its resistance at room temperature and compare to Bosch specs. A shorted or open NTC can trigger E02.
• Control board inspection: If heater and NTC test good, inspect the control module for a burnt heater relay or damaged solder joints. Replace the control module if damage is found.