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...

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.

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.

move the 13.5 to the bedroom and put a 15 up front.bumpy

Bumpyroad wrote:move the 13.5 to the bedroom and put a 15 up front.bumpy^^^^^this. Or replace the 13.5 with a 15K if you want to stay w/ a single unit. But I would have 2 units with a rig this size. BTW, how are you liking this unit? Do you have current weights? It's on my short Lis for 5th wheels.

I have a front living room even with a 15k up front it still runs all day in 90 degree heat. You might try a fan on the floor blow some of that cold air out of bedroom.

A/C Help! | Good Sam Community

Coach-man
Explorer
Jul 21, 2016
Check the AC unit, remove the inside plastic that holds the filter. The intake side and exhaust are separated with a cheap plastic/cardboard product and usually there is significant leakage between the two! Use "metal backed" tape to seal off the intake from the exhaust, your unit will see a bump in its efficiency of the unit!
lee_worsdell
Explorer
Jul 21, 2016
I have a front living room even with a 15k up front it still runs all day in 90 degree heat. You might try a fan on the floor blow some of that cold air out of bedroom.
bqcooker
Explorer
Jul 21, 2016
Bumpyroad wrote:
move the 13.5 to the bedroom and put a 15 up front.
bumpy

^^^^^this. Or replace the 13.5 with a 15K if you want to stay w/ a single unit. But I would have 2 units with a rig this size.

BTW, how are you liking this unit? Do you have current weights? It's on my short Lis for 5th wheels.
Bumpyroad
Explorer
Jul 21, 2016
move the 13.5 to the bedroom and put a 15 up front.
bumpy
ACZL
Explorer
Jul 21, 2016
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
Explorer
Jul 21, 2016
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.

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