2004 W22 AC Ports
I have a 2005 Newmar Kountry Star on a 2004 Workhorse W22 Chassis with a chevy 8.1l engine. The Dash AC is not cooling properly, and I would like to hook up my AC Guages to determine if it is low on R134a, or if the pressures would indicate some sort of blockage.
The low side is right on the firewall at the evap core, but I am having trouble finding the high side port. When I hooked up the lowside port, the pressure went down to around 20 psi at idle, which generally indicates a low charge, but I need to compare it to the high side before adding any refrigerant.
Any hints on the high side port location??