airco issues

[iceman]

Hello
My 19977 f250 460 loses airco pressure via the refill nipple. (converted to 134a ).

I also noted that the airco pump keeps running all the time , it doe not switch off automatically wich it should when the system gets cold . It did cool very well until the system depleted.
the system kept vacuum so i does not have a leak.
I think the high pressure switch is u/s but I do'nt know where its located.Anyone suggestions.?

Thanks William

 

[m78]

I thought you had an issue with this company.
http://www.airco.com/

 

[Mil1ion]

 

[iceman]

Thanks

Great wiring diagram , now I have something to work with