Jeep has heat but no AC

Alright, so the last jeep had no heat, but had AC.. this one is the complete opposite lol. Added refrigerant, line gets cold, but doesn't last long. Things, I've checked so far are the fuses, replaced the blend door actuator below the glove box, and also air door actuator. The air door actuator hoses i had to slap on in the advanced auto zone parking lot and are a bit long, but are connected where they need to. There is an area my dad was messing with while we had the AC cranked up and while he held done a switch, the air was in fact cold, so thought it was a faulty air door actuator. Still no fix. Last thing I just tried was the UV leak kit and added that to the ac line and hoping to find where a leak could be.

Any thoughts or things I haven't checked yet?

 

Did you pull a vacuum as the a/c systems inability to hold vacuum would be indicative of a leak.

 

I will look into that !