More Dometic A/C problems

[Thurman]

We're at Rustic Sand Resort campground Mexico Beach, Fl. I have other posts stating that I have been having problems with the Dometic 25K unit on my TT not cooling properly. This is the third A/C unit on this TT. The third unit was put on in August 2016 under warranty but has not been able to keep this TT comfortable. I added a second 15K unit on June 28th. We had one trip out using both units and the new one just flat out cools better than the older unit. Today the outside temp is 84° at noon, the TT inside temp is 78° with both units running. The new unit's temp differential is an impressive 19° and the older unit's differential is a measly 10°. I'm charting the outside temp, the inside temp, and the differential of both unit's. The thought of this older unit going bad makes me feel sick as it's out of warranty. The two year warranty for the original A/C expired last January and as most of you know Dometic doesn't offer a new two year warranty on replacement A/C units, if they did I might be able to get this old unit replaced under warranty.

[Toothpick]

I have a 13k unit on my 25 ft TH that's crapping out and it was a warranty replacement for one that quit jun 2016.

Since it's out of warranty I'm going to replace it with something besides a piece of **** Dometic!