RV.Net Open Roads Forum: Tech Issues: AC doesn't keep up with heat

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > AC doesn't keep up with heat

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Next
Sponsored By:
BobsYourUncle

Calgary Alberta Canada

Senior Member

Joined: 12/12/2003

View Profile


Offline
Posted: 08/15/21 07:41pm Link  |  Quote  |  Print  |  Notify Moderator

Not sure if I have an issue or not, but my AC can't get ahead of the heat.

We arrived in Fairmont Hot Springs RV Resort in BC this morning, set up and turned on the AC. It has been running non stop all day, and although it is reasonable in here, it is by no means really cool.

32' TT in sig, with a 12' X 3' slide. It is blowing cool, but not really cold. Unit is a Dometic 13.5.

Temperature outside is 34.3 C, or just under 94F.
Temperature inside is 24.8C or 76.6F. Not bad but I'd like it cooler.

I put my hand to a ceiling outlet and it's cool, but not that cold like I'd expect of AC.

We are pretty much open to the sun, obscured as it is by smoke from half the country being on fire.

Does this sound normal?


2007 GMC 3500 dually ext. cab 4X4 LBZ
Dmax/Allison

2007 Pacific Coachworks Tango 306RLSS - 32'

RV Rebuild Website
Site is live, finally launched Aug 22, 2021 @ 6:53 PM
.


Jack_Diane_Freedom

Burlington Ontario Canada

Senior Member

Joined: 05/11/2005

View Profile


Offline
Posted: 08/15/21 08:02pm Link  |  Quote  |  Print  |  Notify Moderator

Well you have a 32 foot TT with a large slide. 13.5 Dometic will never do the job in that size of a trailer. I would think that even a 15k would have trouble keeping up. You are seriously under air conditioned in my opinion.

navigator2346

Wa and points South

Senior Member

Joined: 03/29/2019

View Profile


Offline
Posted: 08/15/21 08:24pm Link  |  Quote  |  Print  |  Notify Moderator

Sounds like the AC is working fine. A 20 degree difference is about all that can be expected from a roof air

Desert Captain

Payson

Senior Member

Joined: 02/19/2011

View Profile


Offline
Posted: 08/15/21 08:26pm Link  |  Quote  |  Print  |  Notify Moderator

Jack_Diane_Freedom wrote:

Well you have a 32 foot TT with a large slide. 13.5 Dometic will never do the job in that size of a trailer. I would think that even a 15k would have trouble keeping up. You are seriously under air conditioned in my opinion.


My thoughts exactly. A 13.5 BTU AC is only good for anything 25 - 27' tops. Secondly no RV AC, regardless of size is going to cool more than about 20 degrees {F} below the ambient temperature. Since the manufacturer skimped so severely on the AC I would be wondering what else they cheaped out on... just sayin.

[emoticon]





wowens79

Georgia

Senior Member

Joined: 01/05/2015

View Profile


Offline
Posted: 08/15/21 08:35pm Link  |  Quote  |  Print  |  Notify Moderator

I’m down here in the Southeast, so we deal with that regularly. My camper is a similar size, and only has a 13.5. Couple of things to try.
Get 2” thick seat cushion foam, and cut to fit in any skylights, or vents. Cut them just a little big and they will stay in place. Makes a big difference.
Keep the shades down during the day.
Set it on 65 at night and let it get cold all night, and that gets it a head start for the next day.


2002 Chevy Silverado 1500HD 6.0l 241k miles and climbing
2016 Heritage Glen 29BH
2003 Flagstaff 228D Pop Up

BobsYourUncle

Calgary Alberta Canada

Senior Member

Joined: 12/12/2003

View Profile


Offline
Posted: 08/15/21 09:36pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the input everyone.
OK, guess it's normal then.
If I ever have to replace it, I'll put in a 15K unit.

ktmrfs

Portland, Oregon

Senior Member

Joined: 06/22/2005

View Profile


Offline
Posted: 08/15/21 10:07pm Link  |  Quote  |  Print  |  Notify Moderator

BobsYourUncle wrote:

Thanks for the input everyone.
OK, guess it's normal then.
If I ever have to replace it, I'll put in a 15K unit.


A 15k unit will help but only marginally.

We have a 32ft with double slides and a single 13.5K Coleman.

If we are in the sun with the awning side facing east, it's brutal, inside drops about 15F sometimes less when temps hit over 100 and direct sun all day. And it hits 80 or so by late morning.

If we are in the sun with awning side facing west, as long as the awning is out even in 100F we can keep the inside in the mid to high 70's and it doesn't hit that till late afternoon. Awning keeps the afternoon sun off the side windows and trailer.

If the front of the trailer faces west, can keep the inside below 75 easily all day, AC will cycle on and off.

Front of the trailer facing east, trailer will stay below 75 but stay on all afternoon, Rear of the AC has a huge window.

And I have mesh window screens on the outside that help a great deal.

Trailers this size really need dual air.

Now, it's maybe a few days/year we have temps like this, some years non at all in the summer with max temps where we camp in the mid 80's in which case the AC does fine for us.


2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!


down home

south

Senior Member

Joined: 06/01/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 08/15/21 10:13pm Link  |  Quote  |  Print  |  Notify Moderator

Check out and possibly clean the ac unit on the roof. If it still won't do the job higher output units are available. I don't know whether you are 30 amp or 50 amp. Competent Technicians, Mobile Tech generally better can advise on this. Some Towables 50 amp have provision, or did, such as our 2002 Holiday Rambler Fifth Wheel for two a/cs but came wit only one, wires everything and framing were there just covered by ceiling and roofing. Wee upgraded one heat pump that was acting up to, nearly double output,in Kingman, Az. Turned the RV into a meat locker. maintained 72 degrees in 103 to 113 degrees or thereabouts...and heat side kept it warm down to below freezing...but furnaces did kick in once or twice.

3 tons

NV.

Senior Member

Joined: 03/13/2009

View Profile


Offline
Posted: 08/15/21 10:40pm Link  |  Quote  |  Print  |  Notify Moderator

If it’s dropping temps by 20degF, better off to count your blessings…

3 tons

rhagfo

Portland, OR

Senior Member

Joined: 07/06/2012

View Profile



Good Sam RV Club Member

Offline
Posted: 08/15/21 10:46pm Link  |  Quote  |  Print  |  Notify Moderator

If you don’t have an cover for your slide get one, it will help reduce the heat transfer through the roof.


Russ & Paula the Beagle Belle.
2016 Ram Laramie 3500 Aisin DRW 4X4 Long bed.
2005 Copper Canyon 293 FWSLS, 32' GVWR 12,360#

"Visit and Enjoy Oregon State Parks"


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 4  
Next

Open Roads Forum  >  Tech Issues

 > AC doesn't keep up with heat
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.