Dishwasher displays E03 and may stop mid-cycle, often during heating or drying.

Safety first: Disconnect power at the breaker before accessing internal components.

• Access the NTC: On many Bosch dishwashers, the NTC is located in the sump area or integrated into the heat pump/flow heater assembly. Remove the toe-kick and possibly the left side panel to access it.
• Inspect connector: Check the NTC plug for moisture, corrosion, or loose pins. Dry any moisture and clean light corrosion with contact cleaner. Reseat the connector firmly.
• Test the NTC: Disconnect the sensor and measure its resistance at room temperature. Compare to Bosch specifications (commonly in the 10–60 kΩ range depending on type). If it reads open (infinite) or near 0 Ω, the sensor is defective.
• Check harness: Wiggle the harness while measuring continuity from the NTC connector to the control board plug. Replace or repair the harness if continuity is intermittent.
• Replace NTC: If the sensor is out of spec, replace it with the correct Bosch temperature sensor for your model. Ensure the sealing grommet is properly seated to prevent leaks.