Man, that's quick response. The high reading was 60-70. The low is <20. What does that mean exactly, that the low reading is correct or the high reading is? The refrigerant did go in as the can is empty now. But I see your point about air being in the system, not that it won't charge. I'm assuming I was liquid charging as I had to shake the can before using.
Bummer about maybe having to take it to a shop. More time and more money than I care to spend, that is why I haven't done it all these years and just lived with the heat.
