Getting started in AC; DIY needs advice! !!!

[GM Tech]

Never put FREON into a 134a system-- Freon is the trade name for R-12. You want to put in Suva if you want to talk trade names. Or better yet, just refer to it as refrigerant and never be wrong.

We are all telling you that pressures mean little or nothing in mobile a/c-- there is a weight specification for a reason- so why not just do it right? Yes it may be more costly, but at least it won't hurt or harm your system.....

[jeepsj]

It just seems like the answers I getting is; if you're ac is not blowing as cold as it used to and you'd like for it to be cooler the answers I'm getting is drain the system; weigh what was in it; put correct amount to specs back in. Seems like an AWFUL expense to bear if it just needs a little freon added!!!!!!!!!

Lesson 1 - you cannot tell how much of a charge is in a system by looking at the pressures. The ONLY way to know the charge in the system is to evacuate and weigh it.