Dishwashers all run through a series of cycles. During these cycles, your dishes are sprayed with soap, rinsed and then dried with heat. A timer controls most of these functions. If the unit does not cycle properly, there may be an issue with the timer of the unit. Testing the timer and replacing it does not require the help of a technician, but be aware: removing the front panel of your dishwasher door may void your warranty.
Unplug the dishwasher unit from the wall.
Open the dishwasher door.
Remove the screws from around the dishwasher panel. Pull up on the door panel to remove it.
Locate the timer motor sitting inside the dishwasher door panel. It is rectangular in shape with two wires connected to it.
Pull on the connectors of the two wires attached to the timer motor with a pair of needle nose pliers.
Set a multitester, a small handheld device used to test voltage, to the X1000 ohms setting. Touch one probe to each of the terminals. You should get a reading between 2000 and 3500. If not, remove the screws holding the motor in place and replace it with a new one.