I hooked up the manifold gauge set to my car to measure the system pressures. The car had been running with the AC on for several hours throughout the day. When I turned on the AC system to the appropriate settings and observed the gauges, my low side was sitting at 40psi and my high side was sittin...

Hello group. I am an automotive mechanic but must admit that I'm very GREEN when it comes to working with automotive/truck A/C systems. Today, I had a pastor from the local church ask me to look at his 3 cars as each one did not blow any cool air. One is a 2001 Mercedes 430CLK, the other a 2006 Saab...