| A/C drip that is different [message #180189] |
Tue, 14 August 2012 08:41  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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We recently had issues with water (condensate) dripping from the controls of our Carrier Low Profile.
Summary: Clean the filters before you do a lot of work......
I was up on the roof with the cover off numerous times and was sure I had found and cured the issue, until the next time we turned it on.... There were no insect nest or drains plugged.
When I ran it with the inside cover down, I could never see anything. I could not even tell where condensate might be leaking in.
When I ran the unit with the cold side open and watched from the top, there was no hint what the problem was. My knees got wet.
Again, running and removing covers... I pulled down the inside an saw a single drop come down through the return air opening. "What the ??"
Again on the roof with all the covers off and nothing misbehaving, but then I noticed that the top of the cold air duct was wet - very wet - where it runs under the return. Snap, snap, screw, screw put it back together again - can you tell this is getting old?
Back inside. It is now about 110° (no joke) inside the coach, so I am going to run the A/C and strategically place a bucket. As I put up the inside cover, I saw more drips as the cover got sucked to the overhead (headliner). There are two filters that slide in - one along each edge. I pulled them both out.
Two things were immediately obvious. The filters were much dirtier than I have ever seen, and the cover is now harder to hold up for reinstallation. Apparently clogged air filters will really mess up everything... I blew the filters clean and put them back in. My bucket never saw a drop.
On the Carrier Low Profile (I cannot speak for others), the evaporator (and therefore the drains) are on the up stream side of the the blower. So, when the the filters get restricted, the pressure may prevent the drains from draining at the required rate and then the messed up airflow inside the case can cause condensate running of the condenser to splash out the return air.
The inlet filters get cleaned every spring, but this year's heat has caused us to us the A/C much more than in any past year.
It is important to learn from others - particularly their mistakes. It is also a lot cheaper to do it that way.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] A/C drip that is different [message #180192 is a reply to message #180189] |
Tue, 14 August 2012 09:34  |
Arthur Mansfield
Messages: 290
Registered: April 2010
Karma: 0
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Senior Member |
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Thanks for the input:
I had the same problem with the filters and water dripping from the controls for a low profile Carrier. The filters had been cleaned when we got to the site but we were there for a month. At near the end of the trip when the dripping started I pulled the filters and cleaned them and the dripping stopped. The filters were very very dirty. The Carrier was run continuously after rear AC started to leak into the RV down the bath room wall by the hall which I still have not figure out (wall dried out after we shut down the rear AC even when we had a heavy rain we saw no more leakage into the RV).
My wife smokes so that will cause the filter to load up faster than one who does not smoke.
Art & Doris
76 EL
Decatur AL
On Aug 14, 2012, at 8:41 AM, Matt Colie wrote:
>
>
> We recently had issues with water (condensate) dripping from the controls of our Carrier Low Profile.
>
> Summary: Clean the filters before you do a lot of work......
>
> I was up on the roof with the cover off numerous times and was sure I had found and cured the issue, until the next time we turned it on.... There were no insect nest or drains plugged.
>
> When I ran it with the inside cover down, I could never see anything. I could not even tell where condensate might be leaking in.
>
> When I ran the unit with the cold side open and watched from the top, there was no hint what the problem was. My knees got wet.
>
> Again, running and removing covers... I pulled down the inside an saw a single drop come down through the return air opening. "What the ??"
>
> Again on the roof with all the covers off and nothing misbehaving, but then I noticed that the top of the cold air duct was wet - very wet - where it runs under the return. Snap, snap, screw, screw put it back together again - can you tell this is getting old?
>
> Back inside. It is now about 110° (no joke) inside the coach, so I am going to run the A/C and strategically place a bucket. As I put up the inside cover, I saw more drips as the cover got sucked to the overhead (headliner). There are two filters that slide in - one along each edge. I pulled them both out.
>
> Two things were immediately obvious. The filters were much dirtier than I have ever seen, and the cover is now harder to hold up for reinstallation. Apparently clogged air filters will really mess up everything... I blew the filters clean and put them back in. My bucket never saw a drop.
>
> On the Carrier Low Profile (I cannot speak for others), the evaporator (and therefore the drains) are on the up stream side of the the blower. So, when the the filters get restricted, the pressure may prevent the drains from draining at the required rate and then the messed up airflow inside the case can cause condensate running of the condenser to splash out the return air.
>
> The inlet filters get cleaned every spring, but this year's heat has caused us to us the A/C much more than in any past year.
>
> It is important to learn from others - particularly their mistakes. It is also a lot cheaper to do it that way.
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumière (say show-me-air) Just about as stock as you will find
> SE Michigan - Twixt A2 and Detroit
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] A/C drip that is different [message #180214 is a reply to message #180192] |
Tue, 14 August 2012 11:30 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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Art & Matt
I don't have a carrier but I know plugged filters do nasty things right before the coil ices. My thought is the Carrier units most likely don't have a very large filter area which would necessitate more frequent filter cleaning. Another thought it could be the Carrier filters may be extra fine and more restrictive then necessary ,in other words a more open type filter would not plug up as quickly. In some commercial applications I wouldn't use pleated filters because they caused air flow problems.
Roy Keen
Minden,NV
76 X Glenbrook
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