Dishwashers are equipped with a variety of sensors and components that work together to determine when to start the water and how to optimize the washing process. Here's an overview of how the dishwasher knows when to start the water:
Door Latch Switch: When you close the dishwasher door, it engages the door latch switch. This safety feature ensures that the dishwasher will not operate if the door is not securely closed. Once the door is properly latched, it sends a signal to the dishwasher's control panel, indicating that it is ready to begin the cycle.
Timer or Electronic Control Board: The dishwasher's control panel, which can be a mechanical timer or an electronic control board, serves as the brain of the appliance. It coordinates the different stages of the washing process. When you select a specific wash cycle and press start, the control panel initiates the cycle and activates various components accordingly.
Water Level Sensor: Dishwashers have a water level sensor or float switch that monitors the water level inside the machine. Before starting a cycle, the dishwasher checks if there is enough water in the tub to begin the wash. If the water level is too low, it will fill the tub to the appropriate level before proceeding.
Turbidity Sensor: Some modern dishwashers are equipped with turbidity sensors that detect the cloudiness or dirtiness of the water during the wash cycle. These sensors can adjust the duration and intensity of the wash cycle based on how dirty the water is, optimizing water usage and energy efficiency.
Temperature Sensors: Dishwashers may also have temperature sensors to monitor the water temperature during different stages of the wash cycle. This information helps the dishwasher determine when to switch to different wash phases, such as pre-wash, main wash, and rinse.
Water Inlet Valve: The dishwasher's water inlet valve is responsible for allowing water to enter the dishwasher when needed. When the control panel sends a signal to start the cycle and the water level sensor indicates that the water level is sufficient, the water inlet valve opens, and water flows into the dishwasher's tub.
Wash Cycle Settings: The selected wash cycle also plays a role in determining when the water should start. Different wash cycles have varying requirements for water temperature and timing, and the control panel adjusts these settings accordingly.
By using data from various sensors and components, the dishwasher's control system can optimize water usage, energy efficiency, and washing performance, ensuring that the water is used efficiently and effectively throughout the entire dishwashing process.