An AC pressure switch works by turning the system on and off in response to changes in pressure.
Understanding the Function of an AC Pressure Switch
The primary role of the pressure switch in an air conditioning system is to act as a control or safety device based on the system's refrigerant pressure. As indicated by the reference, the pressure switch is directly responsible for turning the system on and off. This control is not random but occurs in response to changes in pressure within the AC system.
Essentially, the switch monitors the pressure and, when it reaches certain predefined levels (either too high or too low, depending on the specific type of pressure switch), it triggers an action – either turning the system on or shutting it off.
Importance and Malfunction Issues
This function of responding to pressure changes is crucial for the proper and safe operation of the AC system. When the pressure switch is functioning correctly, it ensures the system operates within safe parameters.
However, as noted in the reference:
- Malfunctioning Switch: If the switch is not working correctly, "it can cause the system to stay on when it should be off or vice versa."
- Consequences: This improper control "can lead to a buildup of heat inside the unit," which ultimately results in "warm air" being blown into the room instead of cool air.
Therefore, the AC pressure switch is a vital component that uses pressure levels as a signal to control the system's operation, preventing damage and ensuring efficient cooling.
