Some of the most common causes of this problem involve broken or malfunctioning drain pumps and motors. Bad belts, piston nut assemblies, check valve flappers and timers can also cause the problem.
No Water
Dishwashers that won’t fill are frustrating and can be the result of low water pressure, a bad float switch, a failing water inlet valve, an impaired float or a malfunctioning door switch.
Water At Bottom of Appliance
A faulty drain pump or a loose drain pump belt can keep your dishwasher from draining properly. The problem can also be caused by clogged drain hoses.
Detergent Left in Dispenser
Dispensers can’t release their detergent if dishes block the mechanism or if residue clogs it shut. Detergent dispensers can also be impaired when the cap of the rinse aid dispenser is loose or the timer malfunctions.
Leaking
Dozens of issues can cause your dishwasher to leak, from loose water supply connections to failing pump seals. Other potential problems include failing float switches and too-loose hose clamps.
Loud Noises
If the volume of your dishwasher is suddenly much louder than usual, you may have a bad pump. Other potential causes of the noise include damaged spray arm components.