How many cans of refrigerant have you put in? Was it working at all before you added extra refrigerant? It would be good to know the high side pressure as well. A harbor freight manifold may be in order.
We tried just one can thus far. The air coming out of the vents is cool,not super cold. When you attach the canister with the gauge, the gauge fluctuates, meaning the needle will move into the green area, then drop back again.
I don't know, I'm just trying to help. Maybe I should just walk away from it and let them take it to the shop.