Air conditioning in new 5th Wheel

How long have you been there? If, you have not been there overnight to allow the AC units time to cool the interior insulation and fixtures, then maybe not.
If you have, get an old style thermometer, and check the temp of the air coming out of the AC units, it should be more than 10 degrees cooler than the room temp air.

Thanks for your response. We have been here overnight already. It does seem like the air is coming out cool. Just not cooling the unit down during the day.

CLHEJ wrote:
Thanks for your response. We have been here overnight already. It does seem like the air is coming out cool. Just not cooling the unit down during the day.

If the air exiting the unit is 10 or more degrees cooler than the air going in, thats about all you can expect.
Putting air pillows in any skylights, putting additional insulation on windows, especially those facing afternoon sun will all help.

Common summer complaint. Factors: Limited insulation, single pane windows, windows not covered (think foil backed insulation), small A/Cs, not enough A/Cs for the length, air leaks, dark exterior paint, low voltage, cooking inside, etc.

wanderingaimlessly wrote:

CLHEJ wrote:
Thanks for your response. We have been here overnight already. It does seem like the air is coming out cool. Just not cooling the unit down during the day.

If the air exiting the unit is 10 or more degrees cooler than the air going in, thats about all you can expect.
Putting air pillows in any skylights, putting additional insulation on windows, especially those facing afternoon sun will all help.

The temperature differential should be closer to 20F-22F. Something is wrong if the differential is only 10F.

Take it to dealer for correcting. It could be as simple as air mixing or clogged fins. That is assuming you have done your part such as keeping the door closed.

Lots of assuming, but should ask, 2 ACs means 50A electric right? Not knowing FW length, number of slide outs is leaving out useful info. I would say normally, units running over night catching up, should easily maintain set temp. Something is wrong!

Have you checked voltage available, during hot part of day.

My FW is labled 4-season, and actually is well insulated. I can tell this, even just from the sound proofing over previous units. It heats easily, cools great, even cooling a hot trailer, just pulling in, hooking up in the heat of day. I have one ducted 15K AC, cooling 30' inside measurement, from back wall to bed head board. I set my stat at 76 day 72 night.

Jerry

Remember that Grand Design boasts a roof R-factor of 40. That's a gross misrepresentation. They manipulate numbers and materials to claim R-40 So the thing to remember is you're in a tin can in the heat of summer. You can do other things to help as others have said. We try to find camping spots that are shaded and keep the shades drawn if the sun is shining in. We also fill the 14" vents with Vent Pillows that have a reflective foil on one side. They also keep the room dark when the sun comes up early. If all else fails, we opt for Popsicle's and the pool.

RobWNY wrote:
Remember that Grand Design boasts a roof R-factor of 40. That's a gross misrepresentation. They manipulate numbers and materials to claim R-40 So the thing to remember is you're in a tin can in the heat of summer. You can do other things to help as others have said. We try to find camping spots that are shaded and keep the shades drawn if the sun is shining in. We also fill the 14" vents with Vent Pillows that have a reflective foil on one side. They also keep the room dark when the sun comes up early. If all else fails, we opt for Popsicle's and the pool.

You didn't say you have a pool, so we'll be down!!!! LOL

OP: Like others assuming you have a wall t-stat, so is it on the high speed fan setting? Yes it takes awhile to get things down to temp, but should catch up if ran overnight. What size A/C units do you have? Does it have the "Quick Cool" selector underneath it or no? FWIW, we have 2 15K units and they will get coach cool in a decent fashion then keep it there (have t-stats set at 72* or so). If you've done all the suggestions made, looked at things and all and still NADA, time to get here looked at again by dealer.

our last fiver had 2 AC's and the struggled to keep me cool in direct sun, all day.. I Made some improvements that helped greatly... Removed round vet collars, they are sticking Into the ducts about 1-1/2 inches.... I cut them all down to be just a hair longer than needed... reinstalled them and used foil tape to seal them... I also re insulated our front closet, that helped a lot as well...

now we have 3 AC's and OMG, what a difference.... 42' dark fiver in all sun in 95+ and DW tells me to turn the temps up as she is cold ! ! ! :B