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’07 Marathon Cruise Air condensation drain
From what I have seen of other Marathon XLII’s the roof A/C’s drain somewhere dead center of coach. I have some moisture staring to accumulate in the D/S 3rd bay and nothing draining in the center. Has anyone tackled blowing out the condnensate line? Before I go up on the roof, any help would be appreciated.
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9 Replies
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Rick,
I did have a problem with a no drain condition on my front roof air . What I found was the drain hose was bent around a corner inside the air conditioner.
Access is gained by pulling down the ceiling panel so you inspect the condensation drain. To repair the extreme bend I purchased a plastic 90 deg tube to fit inside the hose.
I checked the other a/c units and did some rearranging of the drain lines. I used my portable $99.00 air compressor, dialed down the air pressure blowing out each line from inside the bus.
AL
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Rick,
Sometimes the tubes get plugged up with junk where the hose is connected to the pad drain and allows the condensation water to accumulate in the pan until it overflows either to the roof or possibly into the coach. When that happens, it usually makes the ceiling wet.
Then as Al pointed out, the tube could be bent or crushed. If you can get to the drain tube underneath and apply compressed air, there should be a clear path to the drain pan on the roof.
Another problem I found in the pass, the drain tube was spliced and was leaking at the connection.
You are aware that is why Liberty uses cruiseairs so as not to flood your coach!:)
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Gentlemen………….choose your weapons.
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Doesn’t the cruise air still have to have a drain for the condensation that is formed? The ones in my boat sure did…..hmmmm…did Liberty change the laws of physics or something to get rid of condensation?
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Just making a comment on Tom’s post. He is up in years now….. well you understand.
Please Rick, if you blow out the air lines try to do it from inside the bus then out. I do not want to be responible to Wendy explaining how the Marathon became dirty blaming AL on the PC site.
Some of those Liberty guys often become confused early in the morning on where to point it.
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The evaporator’s are not on the roof Mark ole buddy so no condensation dripping from the ceiling like Al has!
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I sniffed around the AC unit today and it appears that I have a condensation pump. The pumps that I inspected appeared to be frozen. So I’ll try to replace them first and see how that works before I go out and buy a Liberty
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Ahhhh…so just where are the evaporators located in your Liberty? And if they leak, where do they drip? Just curious…
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Generally speaking the evaporators are located buried behind cabinetry, either down low with cooling air ducted where needed, or up in cabinetry such as over the entry door. They have trays which capture the condensate and a drain in the tray has a plastic hose connected to it. All condensate drains are routed as necessary to a point below the coach. The drain outlet has a “frog’s butt” one way cap that lets condensate drip to the ground, but is closed to prevent entry by bugs and varmints.
So far so good over three coaches I have never had a plugged drain, possibly because of the fact the drains are not going to get plugged with debris such as leaves or wasp nests, plus the drains are located so there are no kinks to obstruct flow.
But I can say there are limits which only show up during unusual conditions. Most Liberty coaches have OTR so we never see issues with Cruiseair evaporator condensate because the bus is usually level when the Cruiseairs are being used. On one occasion I had to run Cruiseairs while driving due to a failed OTR circuit breaker. When I started backing up my driveway I had water start to drip from beneath a Cruiseair located in a cabinet above the driver’s windshield. My driveway rises about 80 feet in its 285 foot length so the bus was on a 29% slope which clearly exceeded the drain pan’s ability to contain condensate.
On coaches that rely on house AC units for cooling while driving they must have pans with drain systems that can cope with driving extremes such as sharp turns, steep slopes, and excessive coach attitudes that might cause collected moisture to spill over the drain pan sides as mine did. The trouble is that nobody knows if the condensate drain lines are kinked or susceptible to plugging until or unless it happens. If a coach has a design that might be susceptible to problems it wouldn’t hurt to make others aware because water can not only create staining on ceilings for example, I think we all have to be aware of the potential for hidden damage which can get expensive over time.
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