Originally Posted by rick-l
I added a can of R134 and it works great.
When I added it it went almost immediately to 28 low 250 high. 95 degree ambient. I kept adding it till the high side approched 275-290.
There has to be some way to tell if the correct amount is in there besides starting form 0.
You can use the super cool method, but it's much easier to just recover, evacuate, and recharge with the proper amount.