A/C Help!

[Jaycorookie]

Ok, we bought our first 5th wheel this year and are a little perplexed by an air conditioning issue. Its a 2015 Jayco 339FLQS. Front living room. It came with a single 13.5K air unit. Mounted just slightly rear of the middle. Its ducted and struggles to cool the rig. I checked the front and rear vent openings for a second a/c prep. There is one in the rear bedroom. Unfortunately, the bedroom is already quite cool. If I add an additional unit to the rear, I feel it'll be kind of a waste. Any suggestions? How do I cool down the living room? It's been too hot up there to enjoy taking the RV out...

[ACZL]

IMO you need a 15K A/C unit or at least add a 2nd one and run them both. Is there a vent in LR? May want to crack that open and let some warm/hot air out.

[Irish2]

What is the outside temperature when you are experiencing this problem? It may be the case that one 13.5 AC unit is not enough for a unit 38 Ft in length with four slides in 95 degree temperatures. We have 2 AC units and on those really hot days both units work to bring down the interior temperatures to tolerable limits. To get it real cool keep all window shades close.