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Old 07-22-2014, 01:04 PM   #1
Join Date: Oct 2013
Location: Ft Worth
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Air Condition

Thoughts on running your roof top air condition when in storage when out side temperature in the 100's. Gentleman down the street runs his, I asked him why he said it keeps the a/c seals from drying out, he sets the thermostat in the 90's.
Just wanting your thiughts on this.

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Old 07-22-2014, 01:11 PM   #2
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IMHO anything mechanical left to just "sit" has a better chance of failure. I would run mine. Our coach sits outside in the FL sun, unfortunately not under cover. When were not using it I alternate most times between each unit so they get used. So far so good!

Clay & Pebble.. Miss Butter our sweet Goldie (Jan. 2005-Jan. 2015) Sissy our Border Collie
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Old 07-22-2014, 01:18 PM   #3
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I exercise my gen set about 2 hours a month , alternate the roof top A/C one hour each, otherwise they just sit.
Both original to the coach, no sign of any repairs when I remove covers for cleaning. So far so good.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
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Old 07-22-2014, 03:50 PM   #4
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I run our A/C's one at a time when we are not using the MH. I keep the thermostat set to 80.
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 07-22-2014, 04:28 PM   #5
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I do the same thing as Clay and Joe, I run the air while parked in the garage and cycle which unit is operating.
Ken & Anita 2011 Newmar Essex,4522,Cummins 500 ISM,2013 CRV,RVI2 Brake with TPMS **Our Travel WebSite**
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Old 07-22-2014, 05:39 PM   #6
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I run the rear set at 80.. when I exercise the generator I run them both to put a nice load on the generator.. Problem with running the front AC is the sensor is under the cabinet by the windshield.. Sun passes by there all day. even with the sunscreen on and the curtains closed it gets to warm on the sensor and it won't let the AC shut off during the day.. One of these days I am going to move that little bugger.
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Old 07-22-2014, 05:51 PM   #7
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Originally Posted by MSHappyCampers View Post
I run our A/C's one at a time when we are not using the MH. I keep the thermostat set to 80.
same here,plus I think it helps to keep the headliner from droooping.
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Old 07-22-2014, 06:23 PM   #8
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Both of my A/C's are set at 82. MH is plugged in at home. Keeps it from getting so hot that things start to melt.
2011 40' Monaco Cayman PBQ ISC 360
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Old 07-22-2014, 06:58 PM   #9
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When the outside temp is in the high 90's+, I will set one AC unit to run at 80-85 degrees.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
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Old 07-23-2014, 08:55 AM   #10
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Seems to me there are two possible objectives here: (1) preserving the a/c unit itself and (2) preserving the RV from the effects of high temps.

IMO an a/c unit can sit for several months at a time without exercise, but it never hurts to run it once in awhile to make sure it's internal lubricants get spread around and the various valves don't stick in one position. If I haven't had it on in a few months, I would probably cycle it for at least a minute or two when I thought of it.

Keeping the RV interior at some max temperature is subjective too. It also makes a difference whether you have things inside that are temperature or humidity sensitive, e.g. candles, adhesive papers, etc. I wouldn't expect any temp up to about 95 to be a problem, but if you go in and out regularly you would probably want it cooler inside. Direct sunlight is more of a problem to the interior wood and fabrics than temperature.

Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
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