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05-07-2018, 08:25 PM
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#1
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Montana Master
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,916
M.O.C. #19944
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Rear A/C
I think the rear unit might have been/is icing. Usually it low Freon but can be air flow restrictions. Took off the first return grill - minor dirt but insulation all but had the return blocked. Ditto on other side. Put a flash light in on side to hold it up. Used Small spice bottle in other side. Thinking about PVC 1 1/4” or 1 1/2”. One or two pieces? How long?
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05-08-2018, 12:44 AM
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#2
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Montana Master
Join Date: Nov 2005
Location: Paola
Posts: 5,739
M.O.C. #4961
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I cut one for each side about 11 inches long.
__________________
Dennis & Linda Ward
Paola, Kansas
Montana 3735MK Legacy Edition
1200 watts of Solar
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05-08-2018, 09:34 PM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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All I had was 1 1/4 so I did two, about 10" long on each side. I also cut everyother fin off the supply vents in the cieling to increase the outflow also.
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05-09-2018, 08:49 AM
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#4
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Montana Master
Join Date: Jun 2017
Location: POINTBLANK
Posts: 1,916
M.O.C. #19944
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Do the vents just pull off? Seemed to want to stay attached. Just as a temp fix on the road, grabbed some 1" PVC Couplings - measure 1 1/4" OD
__________________
RAM 22' DRW 3500 Crew LB 40 gal reserve tank / RETRAX Bed Cover / 2020 373RD HC / IS / MOPEKA Tank Monitor / Furrion Side&Rear Cameras
Slide Toppers / EMS-HW50C / Sailun 85's
3rd AC / Dometic 320
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05-09-2018, 01:48 PM
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#5
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Seasoned Camper
Join Date: Jan 2014
Location: Apache Junction AZ
Posts: 54
M.O.C. #14022
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My 3791rd returns were pulling air from top of the wall on each side with minitemp meter very high temps. So I turned them so they would pull air from inside room put pvc pipe in ducts set T stat on 77 have 100 plus temps days inside temp. Staying 20 to 25 deg. Below outside temp. Live in Apache junction AZ. So moral to story cooler air in much colder comes out. Happy trails
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