I don't think you answered a key question bohica2xo asked earlier: Your truck came from the factory with R-12. Is it still R-12, or was it converted to R-134a at some point? If it's still an original-spec system, my references for this vehicle call for 29 ounces of R-12 and 7 ounces of mineral oil. ...

Some additional food for thought. As with dsar592, your high pressures seem pretty good. A low side of 36 PSI with a corresponding evaporator temperature of about 42 degrees, even though they are a bit elevated, should still give you some cooling but not at the comfort level we would like. With high...

Sometimes, we tend to overlook the obvious. Try this: Push on the hose toward the AC Pro's connector, and at the same time, pull back on the connector's collar (or ring). The connector should then release from the vehicle's port unless something else is wrong with it.

Ken, I had a few more thoughts on your '06 Durango. At 87 degrees ambient, your high pressures are pretty good, but I think your low side is a bit elevated. Consider this: A low side of around 40 PSI will yield an evaporator temp of about 45 degrees and center vent air of 50 degrees or so depending ...

Sounds like you have a large leak somewhere. Two things you can do: Inject a little UV dye ( half an ounce or less) and charge it, which should allow the compressor to run. That will distribute the dye, allowing you to detect the dye wherever it comes out. Alternatively, carefully go over every acce...

You might also consider having your original hoses/lines restored to maintain the OEM look. There is at least one supplier out there doing such work.

I also see from my source documentation that the 1.32-pounds R-134a spec (21.12 ounces) that you mentioned is only for the 1997 Geo Metro. The oil spec is the same, though: 3.50 ounces of PAG-46.

Here's what my reference documentation says for the 1995-1996 Geo Metro, all engines:

18.00 ounces R-134a
3.50 ounces PAG-46

R-12 to R-134a conversions like this don't usually cool quite as well as the original R-12 refrigerant did. But to make it work satisfactorily, this conversion requires some specific procedures that must be completed before evacuating and recharging a system with the new refrigerant. Your intentions...

One of the questions that came to mind earlier was the orientation of the OT. The long part with the screen should face toward the condenser.