Is the water turned on? 

The water supply valve must be completely open for the dishwasher to fill, washer, and rinse the dishes. 

Is the dishwasher running too long?

Cycle time is anywhere from 1.5 to 4 hours long depending on the cycle and options selected. Energy efficiency is gained by extending cycle time and reducing the amount of wattage and water used during the dishwasher's cycle. Efficient dishwashers run longer to save water and energy, just as driving a car slower saves on gas. If you need your dishes done sooner, you can use the 1-hour wash cycle. Using the 1-hour wash cycle will reduce drying performance and energy efficiency. 

CLICK HERE for more information on cycle time.

Is the water temperature correct?

As part of normal operation, the dishwasher pauses two to three times during the cycle for thermal holds and advances once the temperature is met. When certain cycles and/or options are selected, a longer cycle is normal. Additional time is needed to heat the water to the proper temperature for cleaning and/or sanitizing your dishes. Before starting a load, run the hot water faucet nearest the sink until the water is hot; then turn off the faucet and start the dishwasher.

CLICK HERE for more information on dishwasher water temperature.