Dishwasher runs for an unusually long time or seems stuck on one part of the cycle.

Safety first: Turn off power before testing heater circuits.

• Check water temperature: Run hot water at the sink before starting the dishwasher to ensure a hot fill.
• Verify heater operation: During the wash, open the door briefly (after pausing) and feel if the water is hot. Test the heating element for continuity if not.
• Clean sensors: Clean the filters and sump area; some models use a turbidity/soil sensor that can be fouled by debris.

Repair action: Replace a failed heating element or thermistor if they test bad. If sensors and heater are good, the main control board may be mis-timing the cycle and require replacement.