Dishwasher runs for a very long time or never seems to finish

Safety first: Disconnect power before accessing internal components.

• Check water temperature: Open the door mid-cycle (carefully) to see if water is hot. If cold, investigate heater and NTC as in E3/E9.
• Clean sensors: Clean the turbidity sensor and NTC mounting area to ensure accurate readings.
• Use hot water supply: If connected to cold water, consider connecting to a hot supply within manufacturer limits to reduce heating time.
• Reset appliance: Power-cycle the dishwasher. If long cycles persist with proper heating, sensor or control board faults may require professional diagnosis.