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Old 07-31-2012, 03:55 PM   #15
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1983 31' Airstream310
Cactus Hug , Arizona
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When I have my tire pressures checked, I borrow their air hose and shoot the drain tubes from below.
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Old 07-31-2012, 04:03 PM   #16
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I took this little challenge on this weekend myself. Last trip down to South Padre Island, we had quite a mess with dripping AC. This weekend I ran a cable fish line up the drip line from outside and pulled out quite a bit of gunk. I wasnt convinced though, so I also pulled the AC housing off inside, dropped the metal frame and used a small water bottle to repetedly flush the drain pan and tube with vinegar water. The hose is now clean and water runs through like a champ.

I am a fairly new Airstream owner, but running vinegar water through your home central air drainline is recommended every time you change your filter. I would assume this would be a good practice in your Airstream as well. It was easy to do, just 4 small screws on the plastic housing and 3 very long 10mm bolts for the metal frame. You have to kinda wedge your hand and the water bottle in there to pour, but not a big deal. Personally I will be doing this at least every 6 months. It is a 15 minute maintenance item.

-Smitty
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Old 07-31-2012, 04:04 PM   #17
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Instead of using coat hanger or wire to clean out the drain tube, either of which "could" put a hole in the tubing itself, consider using a length of "weed whacker" nylon line. Especially if chucked in a cordless drill that's operating at a fairly low speed and slowly fed into and out of the trip tube, this seems to dislodge most accumulated "stuff" from the inside of the tube, and is not very likely to cause damage ...

Just my $.02.

Also, I notice on my A/C (Penguin 11k BTU), which is not often used, that even though the drip tube is open, sometimes even when there's a lot of condensate going outside via the drip tube, the unit will still drip a little bit inside when a.) it's just starting to cool the coach - probably maximum condensate time, and b.) the circulating fan is not on highest speed setting. If I run it full blast for a little while, it almost never drips. If I run it on slowest speed fan setting, it almost always drips for a few minutes. YMMV.
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Old 07-31-2012, 04:34 PM   #18
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Quote:
Originally Posted by AirsDream View Post
Instead of using coat hanger or wire to clean out the drain tube, either of which "could" put a hole in the tubing itself, consider using a length of "weed whacker" nylon line. Especially if chucked in a cordless drill that's operating at a fairly low speed and slowly fed into and out of the trip tube, this seems to dislodge most accumulated "stuff" from the inside of the tube, and is not very likely to cause damage ...

Just my $.02.

Also, I notice on my A/C (Penguin 11k BTU), which is not often used, that even though the drip tube is open, sometimes even when there's a lot of condensate going outside via the drip tube, the unit will still drip a little bit inside when a.) it's just starting to cool the coach - probably maximum condensate time, and b.) the circulating fan is not on highest speed setting. If I run it full blast for a little while, it almost never drips. If I run it on slowest speed fan setting, it almost always drips for a few minutes. YMMV.
Ours does the same with dripping on low speed, even when the drain tube is fine. I pulled the filter and observed and it seems that on low speed it 'spits' water out of the condenser coil. Just little bits at a time, but those add up and pool on the filter and once there is enough, here comes the drip.

Seems to be a design flaw. As a side note, I found another 'design flaw' this weekend on my Penguin. If you pull out the filters and look up at the plastic housing, you will see there are 4 screws that hold the housing on. The one on the front right, next to the temp knob, sticks up beyond the AC frame about 1/4 inch. The problem is, that is where the wire bundle runs as well. So you have a pointy screw touching or almost touching your main wiring bundle. I put a little rubber nub (the things you find in a 20 year old toolbox) on the tip of the screw, just as a precaution. Worth checking on your next maintenance weekend.

Smitty
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