AC drain line

I have an old AC unit that has worked fine for many years. Now yesterday it wasn't cooling like normal. I checked the drain line and nothing was coming out. I cleaned it out and ran water through it afterwards to make sure it was clear. Well today so far the AC seems to be working a little better but nothing is coming out the drain line. It has been hot here 104 yesterday and 102 today. It appears nothing is coming out of the AC itself. I open the small clean out right next to the AC and nothing is coming out of it at all. I set the thermostat at 80 and it never even got it down to 80 and never turned off and on. Thank You for any help you can offer.

source https://hvac-talk.com/vbb/threads/2241521-AC-drain-line?goto=newpost