My Son's 1998 Suburban has front and rear A/C. He said the back units
work but the front blows hot air. What I would like to know is: does
this system use a solenoid in the A/C coolant line or does it control
the hot air by closing a duct in the air system? Or could the orfice
jet be bad in the front.
He also said he was charging the system and put 1 can of 134 in it and
that is when this happened, Maybe he just needs more 134. I thought
the front unit would work before the rear in this case.
Any thoughts would be appreciated.