Thanks guys

I had the heater valve replaced because now it's not in "safe mode" and blowing heat outside the vents.

I will, however, run the dye again and see what comes up.

Can anyone help me with the vacuum line diagram to the switch that lies near the heater valve? I want to make sure they put the right vacuum lines where they're suppose to be.

It's just unusual that the diagnosis is low freon when I can't find any leaks with the last time I ran dye.

Could the evaporator be leaking? I hope not.

Jonathan