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Old 01-02-2015, 07:45 AM   #1
Phil Eyler
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Join Date: Mar 2009
Location: Loogootee
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M.O.C. #9197
zone 1 air conditioning

I have a 2014 3402 RL unit. My zone 1 air just doesn't seem to cool like it should. When I change the fan speeds, there is not a lot of difference between low and high. In fact I have to listen really hard to hear the change. On zone 2 the change is very noticeable. Of course the the dealer says everything works fine and it's Keystone's fault because they didn't put enough vents in the living room. Does anyone else notice this or am I just being too picky.
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Old 01-02-2015, 11:07 AM   #2
Montana Master
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M.O.C. #11397
Not enough vents in the LR? How many do you have? I'm sitting here looking at 6 in mine.
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Old 01-02-2015, 01:00 PM   #3
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M.O.C. #9969
Do you have the ACs with the returns on opposite side of the ceiling or is your AC visible in the ceiling? If you have the ceiling returns there have been reports on other forums of those return ducts collapsing and greatly reducing the air flow. Another reported issue, depending on AC MFR is foam pieces installed to keep intake (warn air) and exhaust (cold air) separate shifting causing the exhaust and flow right back into the intake. Several things to look at.
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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Old 01-02-2015, 11:36 PM   #4
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I don't have the exact same model, but I suspect our zone 1 air setup it similar. I replaced my return air filters a few months ago and while I was at it I discovered all kinds of saw dust and other debris up in that area. Cleaned all that out.

Unless it is really quiet inside our unit I have a hard time hearing my zone 1 air running. Where are you located? What are the temps?
Previous: 2008 Montana 3400RL & 2014 3725RL
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Old 01-03-2015, 02:50 AM   #5
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Michelle and Ann have hit the nail on the head. I had the same problem with our zone one and the dealer took the return covers off, cleaned the filters and also inspected the ducting. One of the ducts was collapsed and would not let enough return air come to the unit to give the cooling effect. They took a piece of lath or something else and propped or wedged it into the flex duct and problem solved. Check it out but since you have a new unit(2014) I'd be taking it back into your dealer and have them check this out. It's still under warranty so use that to take care of any problems you might have with the A/C and while it's there, make a list of any other small/large problems and have them take care of those right away too.
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Old 01-03-2015, 03:12 AM   #6
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What Rondo said. Under warranty don't live with any problems, large or small.
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2017 3720 RL, and 2013 HC 343RL
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Old 01-03-2015, 04:34 AM   #7
Montana Fan
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M.O.C. #13564
My 2014 3402 had the same problem, very little if any A/C in zone 1. I took to Camping World in Meridian, Idaho and was told it would cost me $150.00 just to have the A/C inspected for problems. The unit was still under warranty and if the problem was with the A/c unit they would refund the cost. If nothing was wrong with it the kept the fee.

I opened up the intake ducts and found them both fully collapsed. Read on the forum that others have had this problem and installed 6" sections of 1" PVC pipe to hold the duct open. This made a huge difference and we now have Working A/C.

Best advice is to do it yourself, dont ever take it to Meridian Camping World for repair!!
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Old 01-08-2015, 06:06 PM   #8
Montana Fan
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I had the same problem with my 2014 3582RL. Today I pulled off the Air Registers for the Intake and found lots of sawdust inside the vent as well as the filter. Cleaned the filter and the vent. I also found that the duct was collapsed, I used the cardboard roll out of a Christmas wrap and stuffed in the vent and it seemed to improve the AC performance. This is really a bad design. The old AC system worked much better. When you talk to the dealer they just say that is the way it is. I am heading to Arizona next week so it will be a good chance to see if the AC improved. I might go ahead and try to replace the cardboard roll with a plastic PVC . The bedroom AC works great.
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