A dishwasher pressure switch is a component in a dishwasher's control system that monitors and regulates water pressure during the different stages of the washing cycle. It is responsible for ensuring that the appropriate water levels are reached and maintained to achieve efficient and effective cleaning.
Here's how it works:
Water Level Monitoring: The pressure switch is usually connected to a small chamber or tube inside the dishwasher that fills with water during the washing process. As the water level rises or falls in this chamber, it exerts pressure on the pressure switch.
Pressure Sensing: The pressure switch contains a diaphragm or a similar mechanism that responds to the changes in pressure. When the water level reaches a certain point, the pressure switch activates or deactivates, depending on the specific design and the dishwasher's needs.
Signaling the Control Board: The pressure switch is connected to the dishwasher's control board or electronic control unit. When the switch activates or deactivates, it sends an electrical signal to the control board, which interprets the information and adjusts the water flow or other dishwasher functions accordingly.
Cycle Advancement: The control board uses the information from the pressure switch to move the dishwasher through different stages of the washing cycle. For example, it may signal the dishwasher to move from filling the tub with water to activating the wash motor, and then to draining the water during the appropriate stages of the cycle.
The dishwasher pressure switch is essential for maintaining the right water levels in the dishwasher. If it malfunctions or becomes clogged, it can cause issues such as incorrect water levels, overfilling, underfilling, or even failure to start or complete a cycle. Regular maintenance and cleaning of the pressure switch can help prevent problems and ensure your dishwasher works efficiently. If you suspect an issue with the pressure switch, it's best to contact a professional technician or repair service to diagnose and fix the problem.