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07-22-2015, 02:45 AM
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#1
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Member
Join Date: Jun 2015
Posts: 41
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Air conditioner ducting
My question is how the ducting is connected. When only my rear A/C is running I'm getting cool air out of my front return vents. Awhile back I had both units running and according to the thermostats it only got down to about 82. It was 95 outside and very humid. Dealer stated that he hasn't heard from other customers of units not cooling down more. He thinks that below the A/C unit is a plenum that splits the intake and supply and that it may be misaligned. Anyone in the past have this.
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07-22-2015, 04:16 AM
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#2
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Senior Member
Join Date: Feb 2013
Posts: 1,444
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I can't speak for the plenum but air conditioners use the same ducts so yes, regardless of which air unit you are using, it comes out of all your ceiling vents. I have heard others complain that there is some blockage where the vents go into the ducts.
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 Rick and Mindy
Retired
2013 Redwood 31SL, 2011 Ford F350 SRW, 6.7, Crew Cab with Firestone Bags, Titan Disc Brakes
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07-22-2015, 04:57 AM
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#3
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Site Team
Join Date: Dec 2012
Posts: 1,986
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Sounds like the divider between the return air and the output air on one or both of the AC units has come loose. There was a post on that here on the forum but I can't remember what it was labeled. The giveaway is that you have air flow FROM your returns. If the return air and output air mixes it would seriously cut down flow.
Not a huge job but involves getting on roof and taking covers and shrouds off unit.
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 Vaughan & Tracy 2013 RW 36RL, 2013 F350 DRW CC, 2016 Focus. MorRyde IS, MorRyde pinbox, disc brakes, Comfort Ride Hitch. "Life is to be embraced, Grab it with both arms ! "
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07-22-2015, 03:19 PM
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#4
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Senior Member
Join Date: Feb 2013
Posts: 7,101
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Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW
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07-22-2015, 03:43 PM
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#5
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Senior Member
Join Date: Apr 2014
Posts: 383
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Quote:
Originally Posted by atom ant
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Good find! Thank You, this is something everyone should take the time to check. Like is said in the thread it would affect heat pump operation too.
__________________
 Yale & Tammy
2014 F-350 4x4 crew cab, SRW, 6.7, 3.55's, 18K PullRite
2014 Redwood black and Gold 38RL, king slide in slide, 5.5 Onan
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07-24-2015, 03:58 AM
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#6
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Member
Join Date: Jan 2015
Posts: 60
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Just had this same problem fixed. Dealer said that there is inadequate return lines and added another to help unit breathe. Haven't been back out yet, but fixin' to move into it full time in a week or two. At least until Feb. when new house is finished. 
__________________
Kent & Mindy
Isabelle & Elliebelle Miniature Schnauzers
2017 Dodge Ram 3500 DRW
2015 RW 38RL
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07-25-2015, 02:02 PM
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#7
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Senior Member
Join Date: Mar 2012
Posts: 555
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Please let us see your new modifications on the returns. Was toying with that idea but not brave enough to make holes in the ceiling.
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Jay and Linda
2013 36RL
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07-25-2015, 05:45 PM
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#8
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Senior Member
Join Date: Feb 2013
Posts: 7,101
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Cleaning the return filters is also important. Depending on where you are staying, they can get dirty fast.
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Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW
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07-25-2015, 05:59 PM
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#9
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Member
Join Date: Jan 2015
Posts: 60
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Will post pics when we get the trailer back next week (hopefully). They have been waiting on new door replacement, then have to paint it after install...we'll see how that goes. If nothing else, I have learned to lower my expectations as to RW and dealer service! 
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Kent & Mindy
Isabelle & Elliebelle Miniature Schnauzers
2017 Dodge Ram 3500 DRW
2015 RW 38RL
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07-25-2015, 08:44 PM
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#10
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Senior Member
Join Date: Nov 2014
Posts: 2,032
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Quote:
Originally Posted by piper guy
Sounds like the divider between the return air and the output air on one or both of the AC units has come loose. There was a post on that here on the forum but I can't remember what it was labeled. The giveaway is that you have air flow FROM your returns. If the return air and output air mixes it would seriously cut down flow.
Not a huge job but involves getting on roof and taking covers and shrouds off unit.
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I replaced an LED fixture and when I pulled it out I had cold air blowing out of the roof. Checked air returns and the same thing.
went up on the roof today and found that the foam on the front air conditioner had come out between the intake and exhaust. I reinstalled it and completely covered up all gaps in the entire enclosure with aluminum duct tape. Now it works like it should. The main air conditioner was fine
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2015 36RL pushing a 2015 Denali
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07-26-2015, 01:48 AM
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#11
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Member
Join Date: Jun 2015
Posts: 41
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Got up on the roof today. Rear A/C had the foam completely out and the front unit was mostly out. So far so good. Cooling much better.
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07-26-2015, 02:17 AM
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#12
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Senior Member
Join Date: Feb 2013
Posts: 7,101
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That's it, in 2 weeks I have a week of putter time on the Redwood. Definitely a thing I must check.
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Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW
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07-27-2015, 02:20 AM
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#13
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Senior Member
Join Date: Dec 2012
Posts: 399
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Is there a way, location, and duct work to install a second AC unit?
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Elliott & Vicky, and Sadie the GSD copilot
2014 36RE, Onan, Titan disc brakes, 17.5 inch Sailun H tires, lots of other options
2013 RAM 3500 CC, LB, DRW, Cummins, AISIN, 4x4
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07-27-2015, 03:26 PM
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#14
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Senior Member
Join Date: Jul 2013
Posts: 2,054
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WOW - can't imagine a large 5'er in the south even being OFFERED without 2 AC's... our 38gk had 2 and was looking for a location for a 3rd it was so hot in there 
but yes, the vent in the bedroom SHOULD be wired for ac - remove the vent, install the ac, and wire it up... we added a 15k unit to the previous 5'er we had...
But, the MH we have now came with three AC's.
very, VERY nice to push the button on the dash and crank up the 10kw genny to cool it off before we get to the campground !!!!
__________________
Ours: '11 Monaco Diplomat 43DFT followed closely by '14 Jeep 4 dr Wrangler.
Hers: '13 Explorer Sport - AWD 365hp twin turbo scooter!
Previous: '13 Ford F350 CC Platinum and '13 38GK
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07-27-2015, 05:10 PM
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#15
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Senior Member
Join Date: Apr 2014
Posts: 383
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Quote:
Originally Posted by johnboytoo
But, the MH we have now came with three AC's.
very, VERY nice to push the button on the dash and crank up the 10kw genny to cool it off before we get to the campground !!!!
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SHOWOFF! 
__________________
Yale & Tammy
2014 F-350 4x4 crew cab, SRW, 6.7, 3.55's, 18K PullRite
2014 Redwood black and Gold 38RL, king slide in slide, 5.5 Onan
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07-28-2015, 02:13 AM
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#16
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Senior Member
Join Date: Dec 2012
Posts: 399
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Maine isn't quite in the South.
__________________
Elliott & Vicky, and Sadie the GSD copilot
2014 36RE, Onan, Titan disc brakes, 17.5 inch Sailun H tires, lots of other options
2013 RAM 3500 CC, LB, DRW, Cummins, AISIN, 4x4
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