Water in mobile home AC duct


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Old 09-05-07, 07:14 AM
redpenner's Avatar
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Water in mobile home AC duct

Our 1996 mobile home has floor vents and AC ducting running under the floor. Last night we sucked over 5 gallons of water out of the living room air vent where it had accumulated (probably in a "low spot" in the duct). We've noticed water in the duct before, but this time it was worse because the AC had been out for 2 days in very hot and humid weather. (When we got the AC fixed, the water started rising inside the duct.)

My question: does the water in the duct mean there's an opening in the ductwork (humid outside air getting in), or is it more likely from poor insulation below the ductwork in general?
 
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Old 09-05-07, 09:38 AM
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Welcome to the forums

I'm not a HVAC expert but I have worked on quite a few mobile homes. I would check the insulation and belly wrap to see if it is intact. I've seen them sweat when not fully insulated but 5 gal seems kind of extreme.

One of our heat and air guys can give you more info later
 
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Old 09-05-07, 10:30 AM
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If you have a down flow furnace with the coil mounted above the floor line the evaperator coil is likely leaking condensate into the duct.
It is too much water for it to be duct sweating.
Don't even rule out a plumbing leak somewhere above the duct .

Look for a plugged drain line or a partially frozen coil as a source of the water.

If that much water is collecting the duct is likely well sealed.
 
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Old 09-05-07, 10:46 AM
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Marksr and Gregh got it wright. It will be one of the other!
 
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Old 09-05-07, 10:49 AM
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Water in duct

Thanks for the info! I'll have them check the coil.

We've just had two breakdowns in 3 days (a bad capacitor and a bogged-down fan) and we're worried the weight of all that water will pull the ductwork down off the belly of the trailer, so we're wet-vac-ing regularly now that we've noticed the problem.

Thanks again!
 
 

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