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RonAllen

Florida

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Posted: 07/03/09 07:47am Link  |  Quote  |  Print  |  Notify Moderator

I have a 1998 Georgie Boy motor home. The front AC works great but as soon as the AC cycles off it starts dripping water from the AC vent area.
When I bought this MH the worker at the site "blew out" the roof coils with compressed air and said that would take care of the problem... well it ALWAYS drips water after each cycle. We keep a rug on the floor to catch the water now but would like to know how to eliminate the problem short of replacing the AC.
Thanks, Ron

Mandalay Parr

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Posted: 07/03/09 07:52am Link  |  Quote  |  Print  |  Notify Moderator

The coils are freezing up. Try running the fan on High.


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RonAllen

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Posted: 07/03/09 08:02am Link  |  Quote  |  Print  |  Notify Moderator

Mandalay Parr wrote:

The coils are freezing up. Try running the fan on High.


Stays on high all the time.

Paw Paw Festus

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Posted: 07/03/09 08:14am Link  |  Quote  |  Print  |  Notify Moderator

You have a bare spot on a coolant line or evaporator that doesn't drip in the tray. Find it -- tape some foam or other insulation on it to keep the air from getting to it. That'll stop the moisture in the air from condensating and freezing to it -- and that'll make it stop dripping after the cycle when it thaws.

My home unit did this. There was about 3 inches of copper line that was bare and forming an ice shell while the unit was cooling. Unit shut off, ice melted and made a mess. Fixed it with about a foot of window strip foam. Just wrapped it, and tied it off with a nylon tie. No more problem..

Chinook

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Posted: 07/03/09 08:27am Link  |  Quote  |  Print  |  Notify Moderator

Condensation of water is caused by the air conditioner cooling the air below its dew point. This is a good thing.
That water needs to be removed from the air conditioner. Some units have the water flow from the evaporator to the condenser where the fan flips the water on to the condenser to help cool it and increase the efficiency of the unit. With these units, you see very little of the condensation because a lot of it is evaporated.
Other units simply drain the water away. In either case, there is some type of a tray under the evaporator that is there to collect the water and send it elsewhere. Check that the tray is clean and that the drain is not blocked. The problem may not be the coils, but what is under them.





sljkansas

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Posted: 07/03/09 08:51am Link  |  Quote  |  Print  |  Notify Moderator

There are 2 sets of coils on a roof AC. The one that you see fron the rear outside and the one inside the the cover on the inside. If the tech only cleaned the rear coils you may need to clean the insie one. Remove the inside cover and filter, look inside and you should see the finned coil. Check to see id it is full of dirt/dust. A good finger nail brush can be usee to clean mosty of the inside serface dirt off the coils.
Now I had a 92 HHII and had water driping inside. I checkede gasket, cleaned both coils and made sure the drip pan was free of obstructions, and still got water dripping. Wha tI found was that the water was running down one of the mounting bolt. went and removed he top cover and found that the bolt went thought a plate the the compressor was mounted on and water what pooling and running down theh bolt. I took chalking and sealed over the head of the bolt and the water stopped dripping inside.


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wa8yxm

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Posted: 07/03/09 09:42am Link  |  Quote  |  Print  |  Notify Moderator

Before spending money I would suggest two things

The first is to go topside (as the song says "Up on the Roof" and pull the cover off the A/C. Clean anything that can be cleaned, Lube if there are lube ports (Likely not) and note.

What you note is the notch in the base plate where the water is supposed to run out on the roof.. I believe it's to the REAR of the unit.


Step 2: Re-level your rig.. (I'm guessing you are perhaps half a bubble low in front, that is if the drain notch is to the rear)

See if that fixes it

Also, whlie topside.. Inspect for rust holes in the base plate


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javaseuf

California's Gold Coast

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Posted: 07/03/09 10:08am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

Before spending money I would suggest two things

The first is to go topside (as the song says "Up on the Roof" and pull the cover off the A/C. Clean anything that can be cleaned, Lube if there are lube ports (Likely not) and note.

What you note is the notch in the base plate where the water is supposed to run out on the roof.. I believe it's to the REAR of the unit.


Step 2: Re-level your rig.. (I'm guessing you are perhaps half a bubble low in front, that is if the drain notch is to the rear)

See if that fixes it

Also, whlie topside.. Inspect for rust holes in the base plate


Bingo.
The issue you have has nothing to do with coils freezing up.
Even if a coil in a roof-air ices over, when it defrosts, the hcondensate falls into a drain trough and exits the inside through a drain and out onto the roof.
Sounds like the drain is blocked.


Steve
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"Nobody knows how we got to the top of the hill, but since we're on our way down, we might as well enjoy the ride". ("The Secret Of Life", James Taylor).



RonAllen

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Posted: 07/03/09 10:28am Link  |  Quote  |  Print  |  Notify Moderator

So, what I'm hearing is that anything I might need to do will be on the roof and not inside... that right?
Thanks very much for the reply's. Ron

red31

Bryan

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Posted: 07/03/09 01:53pm Link  |  Quote  |  Print  |  Notify Moderator

I'd pull the inside cover off and try and spot where the drip is coming from.

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