Cool cat ac/Heat pump, not cooling

I don't remember if I posted a question on this last year or not. I lost my dad last July and everything else was pushed aside for awhile. I am not a tech so I won't be testing anything myself. I was just trying to find out if these can be recharged or not, and if they still make the units or not if I need to replace it. I couldn't find them on the Dometic site. It is not a roof unit, it is under the rear bed. The compressor does come on when it is set to the cool mode and you drop the thermostat down, but no cold air is coming out. I don't use AC often so I'm not even sure if I will replace it. If I do want to head south with it someday, I will need a working AC unit.
I was in Home Depot and saw that LG is making a window unit that is a combo AC with heat. I may look into adapting that somehow if all else fails.
Thanks for the input.