A/C Is blowing hot air.......

It's like the heater is on. What could be the problem?

Check for leaks and recharge the system. Make sure your compressor is working as well. I'm not great with A/C so its kind of hard to diagnose without looking into it. But I'd say you have a leak and lost all your freon.

you could by pass the low preasure cut off switch on the drier. if the a/c clutch clicks on then most likely its low on freon . a small jumper wire between the terminals on the plug to the switch is all you need