Inside the dishwasher, there is a motor and pump and on its exterior, you will find the control switch, valves, and lower panel. The pump is attached to the motor which forces the water further into the arms. In some models, the reversible motor is installed and in some, there is normal for water in and out. The pump is connected to the top of the motor and the dishwasher. When the motor runs only in one direction, then it will be mounted horizontally with the shaft pointing sideways. For reading about different models, you can refer to the best dishwasher consumer reports. When the motor rotates, it circulates the water inside the spraying arms and mechanical arm helps in draining out the water.
Next, there are control switches, valves, and solenoids. The timer is given on the top of the dishwasher. It can be either mechanical or fully electronic. You can run the dishwasher as per your ease by selecting the time through a timer. There are different washing cycles to select from; be it drying cycle, washing, or temperature of wash. There is a water inlet valve located on the side or back of the dishwasher through which you can control the flow of water for the wash cycle. If the timer stops, the valve automatically stops. This is how a normal dishwasher works in your kitchen.