We have a 2 month old 5th wheel. It has 2 AC's but in this South (and I do mean FAR South...literally will be in Pharr in a couple weeks currently in Houston)....these two just aren't cutting it. Am...
have you pulled the inside covers off your AC to see if the ducts are blocked or if some of the cold air is mixing with the hot air. I just saw some videos today on airflow systems ( pretty sure that was the name). Maybe something like that product will help. I saw some videos on youtube about them.