NO!!! There is no empty/full level with the A/C systemis it ok to just buy the 134a in an autoparts store and just adding it in accumalotor till it is filled?
You can't just dump freon into the system without monitoring the high & low side pressures. You have no way of knowing whether you don't have enough freon in the system, or too much, or the correct amount without a set of gauges....well i did that and my a/c is blowing cold but not ice cold lol any ideas?
What is the temperature of air coming out of the RH center vent? What's the ambient temperature?
Check out the post that I put a lot of info into that is a sticky here: