F 550 2WD Super Duty V8-7.3L DSL Turbo VIN F (2002)
A/C Signal: Description and Operation
Air 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.
The PCM modifies the shift scheduling when the A/C is on and the KOER On Demand and Cylinder Contribution Test (CCT) are aborted. An
Excursion may be equipped with the optional Electronic Automatic Temperature Control (EATC).
