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Old 07-12-2016, 11:58 AM   #15
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Norm excella's Avatar
1971 31' Excella 500
Many , Louisiana
Join Date: Sep 2014
Posts: 21
Originally Posted by J. Morgan View Post
44 years.

Using several tricks, it is 104 outside, and 74 inside right now.

Not bad for a 31 footer with an 11,000 btu unit.

Gradiens super tenui glacie.

Share your tricks!!!!

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Old 07-12-2016, 11:59 AM   #16
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1998 36' Land Yacht Widebody
Great Falls , Montana
Join Date: Jan 2016
Posts: 142
Images: 14
Got two 18yr old Duo-Therms made by Dometic. Both also have electric heat strips. No problem with either. This week at Airstream Park in Cape May and only using 1 unit near the seashore due to only 30 amp connections here. Actually need it more for humidity control being this close to the ocean.

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Old 07-12-2016, 12:35 PM   #17
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1967 26' Overlander
Spartanburg , South Carolina
Join Date: Jan 2011
Posts: 272
Originally Posted by cdufault View Post
What the maximum life expectancy is for a roof top air conditioner? The A/C in my 1977 Argosy 28 MH blows about 20 degrees cooler than outside temp. My local Camping World said a new A/C wouldn't cool much better (but I suspect replacing my AC was too much work.)

As far as I can tell I have an original roof top air conditioner on my 1977 Argosy 28 MH. The shroud has the same beltline trim as the motorhome, and the inside roof control matches the ceiling finish.

The shroud is still in tact and doesn't seem too brittle although I've painted it to provide some sun protection.

I'm just curious if there are older air-conditioners still in the service among air forum members.
The Armstrong atop my '67 is original and just stopped working last Saturday. I am hoping to get it going again with a replacement capacitor for the compressor motor when we get home next week..
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Old 07-12-2016, 12:50 PM   #18
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1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton , Arkansas
Join Date: Mar 2013
Posts: 4,361
Images: 11
How old is your roof top air conditioner?

I use the silver bubble wrap stuff in the west facing windows. I leave my awning deployed whenever the wind allows.

I run the cooler 24/7, on 80 degrees when unoccupied, and on 72 when occupied. (It is hard to catch up when the trailer is heat soaked)

I also found that my air conditioner apparently had foam gaskets missing under the interior shroud that was allowing cooled air to recycle back into the intake, since addressing this issue my cooler is loads more efficient.

As a disclaimer It also helps that my roof is painted white, and my interior is paneled entirely in wood.

Gradiens super tenui glacie.
The fact that I am opinionated does not presuppose that I am wrong......

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Old 07-12-2016, 01:03 PM   #19
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1985 25' Sovereign
Wichita Falls , Texas
Join Date: Sep 2015
Posts: 65
It is 92 and humid out right now, 80 inside of trailer with ac set on low, using original 1985 coleman unit
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Old 07-12-2016, 01:25 PM   #20
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1978 31' Sovereign
Cold Lake , Alberta
Join Date: Jun 2015
Posts: 51
The Armstrong in my 1978 is still going strong, although the fan inside the trailer is a little loud. Not because it's broken though. I just took the shroud off this past weekend, removed the moss, sanded, patched, sanded again, and painted it silver to match the trailer. The AC underneath was in great shape (no rust or damage), so I'm hoping for many cool years to come!
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Old 07-12-2016, 01:37 PM   #21
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1978 29' Ambassador
1955 18' Globetrotter
1975 Argosy 22
PIGEON FORGE , Tennessee
Join Date: Jun 2014
Posts: 8
Got a 1978 Ambassador w/ original Magic Chief unit still going strong

Gino D
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Old 07-12-2016, 02:17 PM   #22
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1991 34' Excella
2009 34' Panamerica
Telluride , Colorado
Join Date: May 2012
Posts: 1,689
Original 1991 Penguin I runni g cold in my 34' in Savannah heat. Its 100 here today... Im chillin at 79 in partial sun.
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Old 07-12-2016, 03:02 PM   #23
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1970 25' Tradewind
San Antonio , Texas
Join Date: Jan 2008
Posts: 164
Images: 9
J Morgan-
What is the key/tricks to keeping your Airstream so cool?? Out 13,000 in our 25' doesn't seem to cool as much as we would like. Thank you-
Victoria & Joseph
2006 30' Classic
1970 25' Trade Wind Custom Renovation
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Old 07-12-2016, 03:33 PM   #24
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1969 31' Sovereign
Paris , Texas
Join Date: Jun 2014
Posts: 73
Original 69 Armstrong in mine. Rebuilt condensate drain pan and replaced fan motor. Thermostat is acting up a bit so I'm looking for a replacement. Still cooling strong.
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Old 07-12-2016, 03:41 PM   #25
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2008 25' Safari FB SE
Grand Junction , Colorado
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Posts: 10,814
Nine years. A couple of weeks ago it was well up in the 90's where we were and the A/C in the sun brought the temp down 21˚. It seems that it worked better in the past. I know the standard for an RV A/C is a 20˚ difference, but I believe it used to do better. Shade, awnings and keeping it on all day will bring the temp lower after a while.

A trick I learned from Bob Cross was after driving in the sun, the inside of the trailer is really hot. Turn on the A/C and set the thermostat to 60˚ and it seems to bring down the temp much faster. I can think of no reason that would work, but it seems to.

An A/C is just a refrigerator and the technology is very old by now. They can make these things able to last lifetimes and for not much more money, but they don't. Buy a fridge for your house and every salesman tells you they only last 10 years. How long the newer A/C's last is still being determined, but I hope it is better than a home fridge. Same for the trailer fridge too.

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Old 07-12-2016, 06:39 PM   #26
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1983 31' Excella
The Woodlands , Texas
Join Date: Sep 2013
Posts: 64
I called Holiday World in Katy, Texas on July 11th to get my 33 year old Coleman a/c serviced or replaced. Everything was going good until I told them I had a 1983 Airstream. Once they found out I did not buy my AS from them, they could not touch my trailer.
I guess they can sell AS but they do not want to work on them… I will remember this when I go to buy my new one.
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Old 07-12-2016, 07:16 PM   #27
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Currently Looking...
belen , New Mexico
Join Date: Jan 2012
Posts: 100
All the AS A/c units I had from 64 to 79 (10) had the orig a/c and it worked great! I suggest you give it good cleaning on both coils in and out and while your up there oil the fan motor. The one I had to replace , I got a new carrier and popped it in myself in one afternoon.
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Old 07-12-2016, 08:37 PM   #28
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1968 24' Tradewind
Oxford, , Mississippi
Join Date: May 2009
Posts: 1,307
My AC is the original Armstrong and it is 48 years old and still works great. The motor has been replaced by a PO and I replaces the on/off switch and the transformer.

Bruce & Rachel
68 Trade Wind
2001 Toyota Tundra
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