Hope you have gotten your ac repaired by now. Our Coleman Mack 13,500 btu ac went out on our 2012 Trail Runner June 2, but, luckily, we had bought an extended warranty on our camper so it only cost us $54 for onsite a/c repairs ( in our case we had to get a brand new ac unit).
We were in Destin,Fl. when the ac unit quit and the Park rangers at campground we were staying at, gave us a list of rv repair companies, some who will come out to your campsite and make onsite repairs. We used one company and they only charge a $65 onsite service call, in addition to any repairs they make onsite. Best money we have ever spent - we also got them to replace the rubber on our slide out ( not covered by warranty but this was needed) that needed replacing too. Thought I would mention the possibility of others using verified outside vendors for onsite campground repairs, as we got our work done quickly on our camper, while on vacation and our camper didn't have to be towed anywhere and left for days or weeks for the repairs.