Refrigerant Pressure Sensor / Switch: Description and Operation
AIR CONDITIONING PRESSURE SWITCHAir Conditioning Pressure Switch:
The A/C pressure switch (ACPSW) is used for additional A/C system pressure control. The ACPSW is also referred to as the refrigerant containment switch.
For refrigerant containment control, the normally closed high pressure contacts open at a predetermined A/C head pressure. This turns off the A/C by opening the A/C demand circuit, preventing the A/C pressure from rising to a level that would open the A/C high pressure relief valve.
An Excursion may be equipped with the optional electronic automatic temperature control (EATC).