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Old 05-21-2020, 10:12 PM   #1
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Air conditioner vent drips water

We have a 2006 Travel Supreme Fifth Wheel, model 40RLQ that we purchased November 2019. Other than a couple of minor fixes we have had to do we have only encountered a couple of problems. The front air conditioner (both are Dometic DuoTherm) has started to have a lot of moisture on the vents. This AC has 5 vents and only the 2 vents in the kitchen area are getting moisture. The back AC vents are not experiencing this. We are the second owners of this fifth wheel and have almost a foot of manuals and paperwork that came with it. Unfortunately I can not find anything on the AC system.
Any ideas?
We live in South Texas about 60 miles from The gulf of Mexico so have lots of humidity.
Thanks
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Old 05-21-2020, 11:07 PM   #2
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I've had this happen to our AC also. In my case the roof drain tube had gotten plugged up and the drain pan under the coils overflowed into the inside vents. Once I removed the outside roof AC cover, I could see the water filled drain pan and then clean out the drain tube with a wire and compressed air.
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Old 05-21-2020, 11:50 PM   #3
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Thanks as soon as the wind quits blowing will send Hubby up to check those out.
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Old 05-22-2020, 06:15 AM   #4
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Quote:
Originally Posted by Lyndajo View Post
We have a 2006 Travel Supreme Fifth Wheel, model 40RLQ that we purchased November 2019. Other than a couple of minor fixes we have had to do we have only encountered a couple of problems. The front air conditioner (both are Dometic DuoTherm) has started to have a lot of moisture on the vents. This AC has 5 vents and only the 2 vents in the kitchen area are getting moisture. The back AC vents are not experiencing this. We are the second owners of this fifth wheel and have almost a foot of manuals and paperwork that came with it. Unfortunately I can not find anything on the AC system.
Any ideas?
We live in South Texas about 60 miles from The gulf of Mexico so have lots of humidity.
Thanks
Condensation on the vents - Lets start inside - Check the Filter for the return vent - good chance it's Dirty, restricting the air flow.

Second - turn the fan on so it is running all the time - not on the auto mode, where it turns off and on this will generally keep the vents dryer.

You will know if the exterior Condensation is working as there will be a steady stream of water coming off the roof when the A/C is running - which is likely all the time in South Texas.

Just like your Cold Glass filled with Ice gets wet the Cold vents if only experiencing limited air flow will get wet - so usually it's all in the amount of air and the Hmidity inside the Unit.

Best of Luck,

links that may help -

https://www.dometic.com/en-us/us/support

https://manuals.heartlandowners.org/...ccessories.pdf

https://manuals.heartlandowners.org/...ide%20V1.1.pdf
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Old 05-23-2020, 03:57 PM   #5
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These roof airs have a dense foam gasket about an inch thick the ac unit sits on and seals to the roof by pulling the unit down tight to the roof and compressing the gasket. I had a leak too and found that gasket to be the culprit and replaced it on both units. The ac condensation that dumps on the roof found its way back in under that failing gasket.
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Old 05-23-2020, 11:49 PM   #6
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Smile

Three great suggestions - we did the filter cleaning and turned the fans on tonite. Monday we will start taking off the AC shrouds and checking drain pipes and pans and also the gaskets. We have some good sealing stuff (doesn't get hard) left over from having to refit our door for a previous camper - hopefully maybe we can use it to seal any leaks.
Thanks to all, we will report back on progress good or bad.
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