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07-05-2020, 09:28 PM
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#1
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New Member
Join Date: Jul 2020
Location: Snow Hill
Posts: 6
Maryland
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AC freezeing
2021 Dutchmen Aspen trail 29bh
AC freezes up if I switch over to the room vents from blowing straight down. Any ideas this is a brand new camper first time out and second time out does the same thing. AC runs fine unless I slide the vent over to force the air flow thru the room vents. Any ideas
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07-06-2020, 12:15 AM
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#2
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Senior Member
Join Date: Jun 2017
Location: Wesley Chapel
Posts: 3,040
Florida
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Are the room vents working? Ordinarily it means that you are low on refrigerant if it freezes up.
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07-06-2020, 12:18 AM
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#3
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New Member
Join Date: Jul 2020
Location: Snow Hill
Posts: 6
Maryland
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Yes they start blowing out pretty good when you slide the main vent over right on the unit. This whole camper is brand new so it shouldn't be low on charge I wouldn't think. It won't freeze up if I leave the main vent open
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07-06-2020, 12:54 AM
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#4
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Senior Member
Join Date: Jan 2018
Location: Beaver Dam
Posts: 883
Wisconsin
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Low refrigerant - poor manufacturing?
worn or incorrect internal bleed
blocked air flow
reduced air flow - poor manufacturing or design
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Paul Bristol
Dutchman Kodiak Cub KD176RD 2018
Nissan Pathfinder 2015
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07-06-2020, 04:45 AM
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#5
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Senior Member
Join Date: Sep 2017
Location: W
Posts: 104
Washington
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My A/C was freezing up with no air flow at all from new. The cooling coil was full of ice and not defrosting on its own, took cover off and found the frost sensor was dislodged from the coils, works as it should now
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07-06-2020, 12:34 PM
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#6
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New Member
Join Date: Jul 2020
Location: Snow Hill
Posts: 6
Maryland
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I will have to check that out. Thanks for the reply
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07-09-2020, 12:40 PM
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#7
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Senior Member
Join Date: Aug 2014
Location: tucson
Posts: 147
Arizona
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bought in 2015, we did not get to break it in until a 2 month stint in CT in 2017,, mine would frost up during the day if put on vents, I moved my thermo couple in the evap coil, up alittle away from the frost,, but it never frosted up when just blowing out of unit,,, got to looking and the vents out into the roof area are about 1 inch framing,, so the unit doesnt have enough airflow to keep from ftosting up, dont know if mine is low, when I did room AC throughout my years of college, for an appliance store, frosting up usually ment low freon, but AC units on these from what I see only dump 20-25 degrees colder air than ambient and mine has been running fine for 5 years except for electrical wiring on top of compressor melting... I think it is a design problem and the manufacturer certainly do not care, I wish I had gotten more than one unit, but I do open my roof vents a tiny bit to release the heat, good luck, if you are under warranty, call it in,, no sense waiting. I only have problems in the high humidity,, not in my home town of Tucson.
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07-09-2020, 12:57 PM
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#8
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New Member
Join Date: Jul 2020
Location: Snow Hill
Posts: 6
Maryland
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Yea I called it in and they are supposed to be figuring it out. Dometic is the unit brand and the thermostat is on the wall. See what happens I can bet it is lack of airflow thru the vents but you would almost thing with the amount of trailers that go out this would be a big issue if that was it with alot of complaints.
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07-09-2020, 01:34 PM
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#9
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Senior Member
Join Date: Aug 2014
Location: tucson
Posts: 147
Arizona
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at some point, there was a pdf or image on here that showed my AC ducting, was an H and two legs went no where, no ducting etc,, then the Ac wires through the duct and also vent pipe, goes through the duct, no sealant at all, my wall behind the TV was cold, with limited air flow,, after being on here 5 years and owning mine that long,, wish I had not been talked into it by my wife, who doesnt drive truck and rig,, so it is all me,, I expand foamed the two legs that did nothing, and retaped inside of AC unit and ducting I could reach,, people feel cold air at light fixtures etc,,, unreal, but not high paid workers, so
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07-12-2020, 04:08 AM
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#10
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New Member
Join Date: Apr 2018
Location: Apollo
Posts: 2
Pennsylvania
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AC freezing
I had issues with mibe when new and solved it by taking the cover off of the unit and revealing the two chambers. It was not sealed well. The other part of the fix was to fix the sealing tape on the two output branches. They weren't completely open so I cut the corners, pressed the tape down then taped over it with gorilla tape. The unit hasn't so much a dripped since then and works much better. Good luck
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07-12-2020, 04:14 AM
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#11
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New Member
Join Date: Jul 2020
Location: Snow Hill
Posts: 6
Maryland
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So i let the warranty do it's thing. Called a service center and they came out. Dometic covered the whole visit, was told that the defrost sensor was not installed into the coils and was just hanging, also the duct that the fan blows into was not tight and was allowing air to blow around the edges, and also some membrane was covering the duct passage to the vents so they tried that up. The unit has 3 times as much sir flow thru the vents now to the point they blew a bunch of saw dust and construction debree out when we fired it up. Hopefully that was the problem with lack of airflow. We will see the next time we go to the camper for a weekend.
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07-12-2020, 02:19 PM
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#12
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Senior Member
Join Date: Sep 2017
Location: W
Posts: 104
Washington
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Sounds to me the hit the nail on the head, good luck and safe travels
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07-12-2020, 03:26 PM
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#13
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New Member
Join Date: Jul 2020
Location: Snow Hill
Posts: 6
Maryland
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Fingers crossed , the lack of quality control anymore is crazy I think.
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