3 days ago, I smelled burn coming from the A/C. Its is a inside electric furnace and it was the capacitor of the fan motor . It was completely burned. I just received the new capacitor and installed it. The A/C seemed to be working for 1 or 2 h, then the air coming out of the vents was not so cold and not so strong. I had to turn it off because the A/C was running non stop and the temp inside was raising. I open the panel and everything was frozen inside. This A/C was working good before the capacitor burned. Is it possible that I hooked it up the wrong way? There was no way to see how the wires should be placed. Or does it need freon... I have 96 for the moment inside and it is 104 outside.

Several possible causes: Bad fan motor, dirty air filter, closed or blocked vents, & low on refrigerant. Since the fan motor capacitor burned out, there's a good chance the motor is bad.