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Old 08-04-2015, 04:57 PM   #1
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3rd AC and Condensation

I'm wondering if anyone else is having trouble with condensation in warmer weather, particularly with a 3rd, middle unit and what solutions you might have found.

Thanks in advance.
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Old 08-05-2015, 07:01 AM   #2
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Change the fan speed to low, makes unit run slower and for a longer period of time. This allows time for the ac to dehumidify your camper. This trouble is caused by cooling too quickly, and not removing the moisture from our wonderful humid southern climate. My last Keystone had a larger main AC and would cool too fast to allow time to lower the humidity. By slowing down the fan speed, it would cause it to dehumidify the camper and increase the comfort inside.
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Old 08-05-2015, 07:22 AM   #3
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These units fan speed from high to low is only a difference of 50 rpm

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Old 08-05-2015, 08:48 AM   #4
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Condensation

This is our 2nd unit with ducted AC and we had no trouble with the other unit in hot weather and I'm not seeing a lot of response here which tells me its not a problem that we should be seeing.

Condensation can be a problem when its cold outside as the condensation would form as cold air is warmed inside the RV. But it should not be a problem with water dripping from the light fixtures and return air vents when its 90 degrees outside and the AC is running, at least in my experience. I was wondering if anyone here has had that problem with a Trilogy 5th wheel or any RV running the AC in the summer.

Thanks,
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Old 08-05-2015, 11:28 AM   #5
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It almost sounds like it is plugged up and not properly draining the condensation from outside which may be leaking back in...
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Old 08-05-2015, 12:10 PM   #6
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That may well have been a part of the problem or that the installation did not include a proper drain. But that has been addressed and proper drains (according to the dealer) have now been installed. But on a warm day we still get water dripping from air return vents and even some light fixtures.

The dealer and factory seem to be trying to convince me that this problem is something that we need to live with. We've not had this problem with previous RVs and I'm not hearing that its a problem with any of you. So I'm thinking its a problem that needs to be fixed.
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Old 08-05-2015, 10:17 PM   #7
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You know, Eco2011 might be on the right track.
I used to have the same issues on farm equipment with water leaking back into the cab when the drain hoses were plugged with dust or chaff. It sure wouldn't hurt to check.
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Old 08-05-2015, 11:29 PM   #8
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I'm experiencing condensation on the ceiling below the ducting run between my two ACs. I'm not familiar with your rig so I don't know if the following helps you any. My rig came with only one ducted AC, and I was not getting any air flow to the BR. The dealership tech discovered crushed ducting. The one AC couldn't cool the rig because of the damaged ducting. FR'S solution was to install a 2nd AC in the BR under warranty. A couple of weeks ago while on 30a service and only running the original AC, I started to see lots of condensation under the ducting run to the BR. Took it back for service today and even the dealership said it is a serious problem that could result in damage to the ceiling and bathroom wall.
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Old 08-06-2015, 02:47 AM   #9
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I have 3 AC units in my Trilogy. The only time I get dripping is when the coils ice up and the AC hasn't cycled (very hot day) and when the filters were dirty. I manually cycle the ACs by going to OFF and then back on. The 5 minute timer does the unit a lot of good as it has time to thaw.

Other than that, no dripping inside. Plenty of water running off the roof for all three units.

106 here in Oklahoma. Whew... I'm melting when I go outside...

John
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Old 08-06-2015, 07:23 AM   #10
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Quote:
Originally Posted by Cypressloser View Post
You know, Eco2011 might be on the right track.
I used to have the same issues on farm equipment with water leaking back into the cab when the drain hoses were plugged with dust or chaff. It sure wouldn't hurt to check.
The service dealer checked and added drains and that did seem to help. But we still have water dripping.

Thanks,
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