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Old 05-30-2016, 05:16 AM   #15
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MN. Travler

We are in Greenville, right by Moosehead Lake. I have not seen any water since, yesterday. I think and just a thought that having run the unit on low fan for quite a while on A/C it may have built up a little condensation on the sheet metal part of blower unit all contained inside the unit so no ceiling stains. I will pull shroud off when roof drys up to check it out but all is well at this moment. I can't wait to see what today brings.

Thanks for all the help Bill
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Old 05-30-2016, 08:06 AM   #16
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Originally Posted by Mike and Cha View Post
Ok, but this is not some emergency he needs to work on while on his trip. It is normal for any AC to drain off the condensation, they all do it, even the one in your house. Most of the newer MH's I've seen just let it drain off the roof, so it will not damage the roof as much as it is an inconvenience to where it drips. If he does have drain hoses that carry the water to the underneath of the MH he can unclog them when he gets home and not worry about it as it is a minor issue. Just my opinion.
Mike and Cha;
You are correct that "It is normal for any AC to drain off the condensation".

However it is NOT "normal" or "convenient" or "a minor issue" if that condensation drips "out of front a/c just below the blower motor squirrel cage" INTO THE RV, (as Saab guy, the OP, described).

Mel
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Old 06-03-2016, 05:36 AM   #17
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Just a thought - I had this issue on a fairly new unit...Have you changed(not cleaned) the filter recently? I found that running thicker than standard air filters was causing this issue for me. I went back to the overpriced Dometic air filter and the problem went away.
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Old 06-03-2016, 08:29 AM   #18
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Other causes

There are a few other things that could cause drips inside after unit is shut off. Part of the piping may be frosting up while the unit is in use. A lot of times, the piping in question may not be over the condensate drip tray. When the unit is shut off, the frost melts, and the water drips inside. I owned an HVAC company for 40 years and have seen a lot of strange things happen with rooftop units. The easiest way to deal with this is carry it to someone reputable and let them fix it. There are a number of technical reasons for this problem that I won't bore you with.

There are a few things you can check if you want.

Is the unit/filters clean? This means the filters, faring, fan blades, and both evaporator and condenser coils.

Another thing that can be done is run the unit for the same amount of time and in the same conditions that usually produces the drip. Do NOT turn the unit off. Go to the roof and remove the fiberglass cover on the unit. Do you see any frost, anywhere? If so, that could be your problem. That could be caused by dirty coils/filter, low air flow, low refrigerant, insulation deterioration, or other malfunction. A professional can tell you why and fix it. If they cannot tell you why, they probably don't know why; find another tech.

TOM
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Old 06-03-2016, 08:44 AM   #19
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One thing you can try is running the A/C on high rather than low. On low, the A/C may produce more frost (and resulting dripping when it defrosts) due to decreased air flow. Also clean/replace filters frequently.
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Old 06-03-2016, 08:50 AM   #20
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There are a few other things that could cause drips inside after unit is shut off. Part of the piping may be frosting up while the unit is in use. A lot of times, the piping in question may not be over the condensate drip tray. When the unit is shut off, the frost melts, and the water drips inside. I owned an HVAC company for 40 years and have seen a lot of strange things happen with rooftop units. The easiest way to deal with this is carry it to someone reputable and let them fix it. There are a number of technical reasons for this problem that I won't bore you with.

There are a few things you can check if you want.

Is the unit/filters clean? This means the filters, faring, fan blades, and both evaporator and condenser coils.

Another thing that can be done is run the unit for the same amount of time and in the same conditions that usually produces the drip. Do NOT turn the unit off. Go to the roof and remove the fiberglass cover on the unit. Do you see any frost, anywhere? If so, that could be your problem. That could be caused by dirty coils/filter, low air flow, low refrigerant, insulation deterioration, or other malfunction. A professional can tell you why and fix it. If they cannot tell you why, they probably don't know why; find another tech.

TOM
That sums it up pretty well.

Clean it up - check it out and for the High Humidity and quick fix.........

Quote:
Originally Posted by bruceisla View Post
One thing you can try is running the A/C on high rather than low. On low, the A/C may produce more frost (and resulting dripping when it defrosts) due to decreased air flow. Also clean/replace filters frequently.
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Old 06-03-2016, 09:01 AM   #21
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Had the same issue with our last coach.

There are a couple of weep holes in the catch pan under the condenser that are supposed to let the collected condensate drain out onto the roof. When I pulled the cover off the offending unit I found both these holes, one on each side of the pan, were blocked. I cleaned out the pan and enlarged the holes - no further problems.
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Old 06-03-2016, 09:10 AM   #22
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Hello all, We are on our maiden voyage in our new to us 02 HR endeavor DP, had coach all cked out before trip but as no trip goes perfect. We have had a new problem each day. Saturday the cold water supply line to water heater blew out. Thank god we heard it and shut water off and put new fitting on line all was good. Today's issue small amount of water dripping out of front a/c just below the blower motor squirrel cage. It was raining for a while, and we had a/c running all night no water drip all seem to happen when we shut unit down any input or help would be great.
Thanks Bill
Quick tip:

If you cold water line on the water heater broke, good idea to replace the hot line too....

If it's like most, it's just a washing machine hose but I bet the original had plastic fittings? The hot water really does a number on those, and I would replace both with metal ended washing machine hoses.

I had that exact thing happen to me, and like you, thank goodness I was inside at the time. Another good reason to shut the water off when you leave.
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Old 06-03-2016, 11:03 AM   #23
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Mike and Cha;
You are correct that "It is normal for any AC to drain off the condensation".

However it is NOT "normal" or "convenient" or "a minor issue" if that condensation drips "out of front a/c just below the blower motor squirrel cage" INTO THE RV, (as Saab guy, the OP, described).

Mel
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You are correct but his original post did not indicate it was leaking inside the MH, that is what I was responding to on the outside, if you re-read my post that's what I was referring to-outside on the roof. But thanks for correcting me though!
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Old 06-03-2016, 11:36 AM   #24
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MN Traveler I was having a small drip inside the coach coming from right below the blower motor. I believe its condensation because it's been raining here in Maine most of the day and no drips at all. We had been running the A/C most of last night and no drips it only showed up when we shut it down after running a/c on low fan cooling. I rechecked the hold down bolts to make sure they are tight and will Check roof top when it stops raining and drys up, but have had no water drips since this am. Thanks for all the help and see what tomorrow holds, been an interesting trip so far. Great shake down cruise and learning as much as we can.
Bill
I had the same problem and it was the coils frosting up in humid weather and when the ac shut down it would drip and stain the ceiling. They put a part in the AC at the factory. I believe it was called a thermister. Any way that solved the problem except for the most humid weather.
Mel
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Old 06-03-2016, 12:00 PM   #25
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You are correct but his original post did not indicate it was leaking inside the MH, that is what I was responding to on the outside, if you re-read my post that's what I was referring to-outside on the roof. But thanks for correcting me though!
Mike and Cha
Right again.

Because the OP said "Today's issue small amount of water dripping out of front a/c just below the blower motor squirrel cage", I assumed he meant "into the coach"... but since he didn't specify "into" or "outside of" the coach we were left to guess WHERE the small amount of water is dripping.

Mel
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