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Old 08-05-2015, 05:31 PM   #1
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Join Date: Jun 2011
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Basement ac

I have a 2009 journey, we spent 3 days at Destin, Fl the air temp. was 94 and inside the coach was 84, air ran all day and finely shut down at 8:00 when it started to cool down little is this normal or do I have a problem. It worked find at night when it was cooler This the first time we have used it in this kind heat. I have checked everything I know to check. Help please
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Old 08-05-2015, 06:02 PM   #2
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Works like mine.

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2003 Sightseer 33L
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Old 08-05-2015, 06:55 PM   #3
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The rule of thumb for air conditioning is that the cool air coming out of the outlets should be about 18-20* cooler that the ambient air in the coach. That said, you should have been able to get close to 75* with an outside temp of 94*. You may only be running on 1 or the 2 compressors in your basement A/C. The easiest way to check is to unplug from the shore line and start your generator. Once the electrical power has stabilized turn on your A/C and monitor the amperage reading on your panel. When the A/C starts, you should see an amperage spike to about 18 amps, then it should slowly drop and level off at about 12 amps. About the time it levels off, you should see another spike to about 25 amps as the 2nd compressor comes in. Once both compressors are running, the amperage should stabilize around 21-23 amps. Before you do this test, make sure your thermostat is set for at lest 3* cooler that the current temp inside your coach. If it turns out that only one compressor is running, you may need a new start capacitor on the one that's down. If both compressors are running, the system may need a charge. Also make sure your return air filter is in good condition and that it is not blocked in such a away that may restrict air flow.
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Old 08-05-2015, 06:59 PM   #4
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I'm in Clermont, FL where it was 93 today and my basement AC had no trouble keeping up. In fact it ran in single compressor mode a lot of the time. These units are notorious for developing separations in the main duct that runs up inside the rear cap. Open the rear "hood" and stick your hand inside the right (passenger) side of the rear cap. If you feel cool air blowing around, you've found the problem.
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Old 08-05-2015, 09:10 PM   #5
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Originally Posted by Johndale View Post
Works like mine.

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Mine too
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Old 08-05-2015, 09:11 PM   #6
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Considering the insulation package on these coaches, a 20 degree differential between inside and outside during very hot weather is about what you can expect. That was our experience in San Antonio several years ago when it was above 105 degrees for several days.
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Old 08-05-2015, 09:25 PM   #7
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Some things that may help your A/Cs ability to cool the coach:
1. Use something to lessen sun intrusion on windshield. Reflectix, pull drapes, solar shade.
2. Window awnings or day shade on all windows.
3. Reflectix in back of cabinets and closets.
4. Park facing North if possible.
5. Lower tstat early in the day when you're expecting a hot day.
6. Make certain filter is changed often.
7. Check supply plenum for leakage to outside
8. Keep entry door closed as much as possible
9. Make certain #2 compressor is operating.

BTW........The 18 - 20 differential is across evap coil. Not necessarily between outside and inside temps.
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
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Old 08-06-2015, 07:31 AM   #8
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Thanks for the input will be checking today
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Old 08-06-2015, 08:44 AM   #9
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More then one of us have added an air conditioner to the roof. In direct sun light its almost impossible to cool the coach with the basement air or even two roof air units when the coach is in the 40 foot range. My brother in law has a Monaco Ambassador 40 foot with two 15000 btu air units and in direct sun light and over 90 degrees it won't stay in the lower 70's.

cover the windows or park under trees both help a lot.

Happy travels.
05 Meridian, 39K, 350 CAT. '13 F-150 4X4, Blue Ox Aventa LX, Roadmaster 9160, or 2016 Spyder RT in 7x12 trailer, USAF Retired.
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Old 08-06-2015, 09:22 AM   #10
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In addition to all those great responses, when in Palms Springs, CA and the temp is over 100 degrees I bring in the slideouts thus making a smaller area for the AC to cool.
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Old 08-06-2015, 09:40 AM   #11
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Went out this morning temp in the coach was 84* turn the air on and with in 30 minutes was down to 77*
found no leaks in duck work. Both compressor are working. The coach is in the garage so no heat from the sun.
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Old 08-06-2015, 09:49 AM   #12
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I forgot to include that I added a Coleman roof air unit. The roof unit works great however it is very loud compared to the basement unit. There are many posts on how to install the roof unit.
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Old 08-06-2015, 09:58 AM   #13
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Did you check the duct work at the rear of the coach where it goes up to the ceiling? There have been a number of incidences where the duct work has separated just above the AC unit. It doesn't have to be a full separation to allow a significant amount of cool air to escape.

Another thing to check is to be sure the circuit breakers for BOTH compressors are in the on position. We had a cooling problem only 1 time with our 2001 Adventurer with the basement air. Luckily it was when we attended the GNR in Forest City. I was cleaning the dust and dirt off the circuit breaker cabinet door and happened to get some inside. When I brushed it off I inadvertently shut off one of the compressor breakers.

The Coleman service rep came over to check the system and found no power to one of the compressors. I opened the panel door to check the breakers and found what I had done. It was a bit embarrassing but no damage other than to the ego.
2013 Adventurer 32H
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Old 08-06-2015, 10:11 AM   #14
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I have a 2006 suncruiser 38t with basement air. It never seemed to cool the coach the 2 years I've owned the unit. I took the coach to the shop and had them go through the A/C. I knew both compressors were running at 21-22amps. There was no leakage at the rear cap. Long story short they found nothing wrong with the unit other than dirty. The Evap coils were almost completely stopped up. They recommended removing the unit and chemical cleaning and steam cleaning the coils and fan. After doing this last weekend in Pensacola with about the same temps as Destin, the unit kept it around 75 degrees even in the hottest part of the day. An unbelievable change after the cleaning. There is more air flow from the registers and much colder air. I was really happy with the results other than the price for the cleaning. OUCH! But it did make a great difference.
2006 Itasca Suncruiser 38T
Traveling with Westies, Max, Ellie and new addition Sophie.
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