Three or four years ago I installed a new AC compressor, receiver/drier, expansion valve and auxillary fan. I flushed the system, pulled a vacuum and filled it with R-12. My AC has worked perfectly until this summer. Just not blowing as cold as it used to.

I hooked up my manifold gauges which read 39-41psi low side and 215-220 high side. Outside temp is 86 degrees with 60 percent humidity. My hunch is simply that some R-12 has leaked out and it's time to add another can. However, I have no way of evacuating the system and weighing what's in there. I don't have a leak detection device and really don't want to invest in one.

What do you guys think?

Thanks,

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
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1986 Camaro 125,000 (sold - P.O.S.)
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