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Old 05-29-2016, 07:09 AM   #1
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Jayco Air Conditioning

Have a 2016 Jayco pinnacle 36fbts fifth wheel. new from factory. Have had it the last 2 months and haven't needed to use the a/c due to cooler temps. Now it is nice and warm here in Ohio and we are preparing to leave in it next week for full timing for the next 2-3 years. We have two a/c units installed from the factory. Both are running constantly and we can't get the temp down below 80 degrees during the day and it's only in the mid to upper 80s. This is our first RV but I don't think I'm doing anything wrong. Any thoughts or advice. Thanks in advance.
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Old 05-29-2016, 04:59 PM   #2
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We have two in our class A Jayco coach. We can bring 85 temps down to low 70's, it does take a few hours. Once there it's much easier to keep the temp there, although in direct sun they do run a lot.

One of our units seems to produce much cooler air, it's also in the smaller space (the bedroom). I will have the freon/puron checked on the one unit just to be sure. You may want to have your checked too.

Best of luck,
Steve
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Old 05-29-2016, 07:14 PM   #3
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What brand name a/c units?
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Old 06-04-2016, 02:05 PM   #4
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Originally Posted by dwhit View Post
What brand name a/c units?
Does it matter?

2 units will cool a 36' RV just fine in Ohio. IF they're working right, they should have a 20 degree difference between air in and air out.

IF this is a ducted system, often the duct work is done sloppy and there isn't enough airflow.

Is the compressor running?
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Old 06-07-2016, 08:25 PM   #5
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cb1000rider-Yes, it matters. Dometic released a TSB admitting to supplying an inferior product since 2014. I'm on my third 15k Dometic roof unit. There are posts in the archives were RV owners have replaced three failed units. I purchased a five year warranty for my third unit.
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Old 06-08-2016, 07:51 AM   #6
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dwhit,
Sheesh.. didn't know there was a run on bad units. Thanks for the info.
What is it that fails on these units?
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Old 06-08-2016, 08:31 AM   #7
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Check your electical connections. A new rv doesn't mean they are good. A loose connection will cause a high amp draw and alot of heat making the connection worse. I've seen many rv's not cooling in parks next to us and every time it was a hot connection somewhere. One even had it's breaker panel go up in smoke due to loose connections getting very hot.
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Old 06-09-2016, 05:03 PM   #8
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cb1000rider-The team that replaced my 2nd one told me early corrosion attacks the hi pressure condenser assy causing the gas to leak out. This a/c unit lasted 5 months. Third one replaced in January still works and during the purchase I opt'd for Dometic's three year addt'l warranty for a total of five years warranty for this last one as I had to pay full price. Two years from the initial unit isn't enough. I had a 1999 Coleman unit on my class "A" that worked fabulously when I sold the MH in April.

We haven't heard from the original poster in some time...wonder what's goin'-on...
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Old 08-13-2016, 09:18 PM   #9
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turns out one of the ac units was missing a sensor from the factory. Dealer was awesome and got it taken care of within 48hrs and only delayed our departure by a day. Since this has been taken care of we have not had any issues cooling our home in the 90 degree heat this summer. Sorry for taking so long to update. Thanks for all of your help.

Jeremy
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Old 08-14-2016, 07:57 AM   #10
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I have never cared for the Dometic A/C units for the past 10 years. But on a 36' 5er, the two 15 kbtuh units should be more than adequate in 95 degree weather.

Our 40' HitchHiker Champagne has two 15 kbtuh Coleman units and we can hold 76 degF in full sun and 107 degF outside.

Ken
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Old 08-14-2016, 03:07 PM   #11
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I'm not a fan of any of the major brands of roof mounted HVAC units.

I wish manufacturers would look into putting mini-split residential heat pumps into fifth wheels with an evaporator in each room--and compressors mounted on the rear of the trailer.

Some of those units have variable speed scroll style compressors and an EER of 22+ which is extremely efficient. And the trailers could be a foot shorter in height.

Such units are the standard in building throughout the world--outside the U.S. And they're substantially more reliable than today's RV a/c units.
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Old 08-15-2016, 07:37 PM   #12
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That Hitchiker is insulated alot better then the Jayco which may account for helping to keep the temps low in high heat conditions.
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