Whirlpool WDP540HAMZ dishwasher cycle takes too long

The checks in more detail

If the time on the display does not count down, the dishwasher may be waiting for the water to heat, which in a machine fed with cold water takes a long time, so run the kitchen tap until it is hot before starting. The cycle's sensor measures how dirty the water is and extends the wash when it senses heavy soil. Check the water supply and the drain. A slow fill, from a partly closed valve or a clogged inlet screen, lengthens the cycle,

and so does a slow drain from a clogged filter or a kinked hose, since the dishwasher waits for water to leave. Clean the filter, check the drain hose and the sink connection and run the disposal. A heating element that has failed leaves the water cold, and the cycle stretches as the control tries to reach temperature; dishes come out wet and warm rather than hot. The heating is shown on the display by the heat symbol or the cycle's stage. Power fluctuations also lengthen a cycle.

If there is a code, look it up in the manual. Run the Clean Washer cycle monthly. Make sure you have not selected an Extended or Delay option. Some owners compare the time with their previous dishwasher, but modern efficient dishwashers run longer on purpose to use less water and energy. If the cycle exceeds the manual's longest time by a large margin, contact Whirlpool with the model and serial number, since a heater or a sensor may need service. Keep the filter clean for the best performance.