Check the water supply
Speed Queen dishwashers connect to the plumbing in a home to draw adequate water. Check to ensure the connection remains secure and the water shut-off valve is in the open position. Even a partially closed valve can prevent adequate water flow for proper operation. Verify that water runs in sinks or other appliances in the kitchen.
Inspect the overfill float
The overfill float prevents water from entering the machine when it senses water levels becoming too high inside. This is one of the dishwasher parts that can become clogged with food or other debris and stuck in place. Clear any clogs in or around the float to allow it to move freely. If cleaning the area around the float doesn't solve the problem, you may need to replace the overfill float switch, which communicates with the system to prevent overflow.
Replace inlet components
Another part that may require dishwasher repair that ranges from cleaning to replacement is the dishwasher inlet valve. A clogged valve prevents water flow directly, and one stuck in the closed position requires replacement with a new part. The dishwasher water inlet assembly may also clog over time, preventing proper water flow from the inlet valve to the rest of the washer. Clogs in this part of the dishwasher require cleaning, and worn or damaged inlet assemblies require replacement.