A dishwasher contains a float, which rises as the water rises within the appliance. When the float reaches the appropriate level as determined by the water level, it stops the water flow. If the float is malfunctioning, it does not allow the dishwasher to reach the appropriate water level.
The float switch is the mechanism that controls the float assembly. When the float reaches the correct level, it prompts the float switch to shut off the water flow. A faulty float switch does not accurately gauge when the float assembly should be activated to stop the water flow.
The water inlet valve also determines the amount of water that enters the dishwasher. The valve contains filter screens to prevent dirt and debris from contaminating the appliance. If the screen filters are obstructed with food waste or other debris, the amount of water entering the machine is adversely affected.
The drain is controlled by a solenoid, which regulates the flow of water out of the machine. If the solenoid if malfunctioning, the water flowing into the machine also may drain out at the same time. In addition, the drain hose may be positioned too low and needs to be raised higher to allow the water to stay in the machine.