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Old 05-16-2019, 09:57 PM   #1
Sdgood1
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A/C ????

2014 3150RL 2 A/C units. Second trip for the new to us ride. Went to LV for a few days, temps running in mid to upper 90ís. In the morning with the sun on the back and drivers side, the ducted A/C barely kept it in the upper 70ís. Of course the bedroom stayed nice. Reading some of the posts on here thatís about normal. Any input?? Solutions??
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Old 05-17-2019, 12:47 AM   #2
Texan
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Most likely your return air vents in the den on the ceiling are partially collapsed and so not working properly. I cut me 1 1/4'' diameter pvc pipe 9'' long and installed them in the return air ducts to open them up. I used 2 in each vent where some have used 1. I stuck my pipe in the vent parallel with the vent then turned the pipe and inserted it in the duct toward the center of the rv. You can push it the whole length of the pipe or more up in the duct and this will help the return air work much better. I am sure there are some other ideas others may have but this is something many on this forum have done that is very easy to do for less than 10 bucks.
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Old 05-17-2019, 01:54 AM   #3
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You need to do what Texan said above. I did that and it made a difference.
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Old 05-17-2019, 07:47 AM   #4
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Since we summer in Kansas we made a number of changes. First we did as suggusted above. Then we took the supply ducts off the ceiling and cut every other fin off to improve air flow and before we put them back we cut the sleeve down so it didn't protrude into the air ducts anymore. Both of those things made a real difference. Last we gave up an added a third AC and wired it so it can run at the same time the other two did.
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Old 05-17-2019, 07:57 AM   #5
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Ditto advice above - the air return can easily be done there - opening the vents like DQ mentioned helps - this is harder to do at a campsite, might just try removing 4 of them - 2 in bedroom and 2 in main cabin just to get you running but do the air return first
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Old 05-17-2019, 09:23 AM   #6
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Not too long ago I read that someone had made modifications to the vents on the units themselves. Testing with a meter it seems the lovers on the units restrict air flow significantly. He cut them out and replaced them with wire screens. The modifications allowed the units to vent more efficiently and therefore run much more effectively. Simple fix.
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Old 05-17-2019, 10:53 AM   #7
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Quote:
Originally Posted by McIver View Post
Not too long ago I read that someone had made modifications to the vents on the units themselves. Testing with a meter it seems the lovers on the units restrict air flow significantly. He cut them out and replaced them with wire screens. The modifications allowed the units to vent more efficiently and therefore run much more effectively. Simple fix.
my only thought is the louvers provide air direction - good for when an individual may not want air directed at them and also would aid in stirring up the general air - food for thought. and screen might actually slow down air movement Ö not sure - would need an AIR Expert
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Old 05-17-2019, 12:56 PM   #8
MidMOTraveler
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Just pop a couple of the directional vents off. You will be amazed at the difference.
I did do the pvc fix in the return air. But we had another issue with the back unit not being mounted directly over the opening. Had some water coming through the back return vents, mobile service found and repaired. Submitted pictures and bill to Keystone and they reimbursed.
That really made a difference!
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Old 05-17-2019, 01:11 PM   #9
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Quote:
Originally Posted by Sdgood1 View Post
2014 3150RL 2 A/C units. Second trip for the new to us ride. Went to LV for a few days, temps running in mid to upper 90ís. In the morning with the sun on the back and drivers side, the ducted A/C barely kept it in the upper 70ís. Of course the bedroom stayed nice. Reading some of the posts on here thatís about normal. Any input?? Solutions??
Not normal. Blocked/collapsed ducting a common problem. Follow some of the posted recommendations and you will feel a difference.
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Old 05-17-2019, 03:47 PM   #10
Sdgood1
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Thanx all. Home now , so will really look into the problem and try some of the fixes.
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Old 05-17-2019, 06:39 PM   #11
McIver
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The vents on the roof unit are the ones I am talking about.
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Old 05-18-2019, 12:44 AM   #12
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I forgot to mention you can buy the air-ducts that have the vent slats further apart and are directional at PPL. This allows more volume of air. I believe they are about 8 bucks each. I installed these on mine. You can also add a couple of extra ducts to bring in more air at a particular area. When you are running in the mid to upper 90's you tax the limits of the a/c. If you can keep the inside 20 degrees cooler than the outside then consider yourself lucky.
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Old 05-18-2019, 04:50 AM   #13
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What is PPL?



Quote:
Originally Posted by Texan View Post
I forgot to mention you can buy the air-ducts that have the vent slats further apart and are directional at PPL. This allows more volume of air. I believe they are about 8 bucks each. I installed these on mine. You can also add a couple of extra ducts to bring in more air at a particular area. When you are running in the mid to upper 90's you tax the limits of the a/c. If you can keep the inside 20 degrees cooler than the outside then consider yourself lucky.
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Old 05-20-2019, 07:42 AM   #14
Ram Montana High Country
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good resource

Quote:
Originally Posted by Chasnracin View Post
What is PPL?

https://www.pplmotorhomes.com/rv-parts-rv-accessories
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