Dishwasher shows E3 and stops; water fills but does not heat properly, dishes come out cold and wet.

Safety first: Turn off power at the breaker and allow the unit to cool before accessing internal components.

• Confirm hot water supply: Ensure the kitchen hot water line is delivering hot water (at least 120°F / 49°C). Run the sink until hot before starting a cycle.
• Inspect wiring at heater: Remove the lower kick plate and visually inspect the terminals on the heating element for signs of burning or loose connections. Tighten or replace terminals as needed.
• Check for continuity: With power disconnected, use a multimeter to test the heating element for continuity. An open reading indicates a failed element.
• Inspect temperature sensor: If accessible, check the NTC sensor wiring for damage or corrosion at the connector.
• If heater is open or shorted: Replace the heating element assembly following manufacturer procedures (disconnect wires, remove mounting nuts or clips, install new element with proper seals).
• If heater tests good: The issue may be with the temperature sensor or control board. These typically require advanced diagnosis and may be best handled by a technician.