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Old 04-15-2014, 11:51 AM   #1
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Front AC Drain

Does anyone know the routing of the condensation drain tube on a 01 36FD? The drain tubes T into a half inch vinyl tube that goes into the roof on the curb side of my AC box, I'm wondering where it goes from there. I've poured water into the condensation cups on the bottom of the AC unit and the drain tubes on the inside have water in them, but it must be plugged somewhere after the T, because I haven't found any water dripping to the ground.


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Old 04-15-2014, 12:54 PM   #2
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Sounds like it's the front a/c that you are talking about. It goes to the passenger side of coach, then back to the rear of the refrigerator, down thru the house floor into the waste tank bay, across the top of the waste tanks to the drivers side and down thru the basement floor. It can be seen by removing the utility bay cover or looking under the coach by the utility bay. There are two 1/2 pex lines there, one for the rear fresh water tank overflow, and the other is the front a/c drain.

Jim & Sandy
2008 34' FDDS Alpine
Limited SE
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Old 04-15-2014, 01:02 PM   #3
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There may be a dip or two in the line as it crosses from the passenger side to the drivers side causing it not to drain properly. On my 02 coach I cut the drain line off and put it thru the basement floor on the passenger side. This is easily done by opening the utility bay panel on the passenger side.
Jim & Sandy
2008 34' FDDS Alpine
Limited SE
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Old 04-15-2014, 04:56 PM   #4
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Unfortunately it varied from year to year and model to model. On my '98 the drain comes out right above the front passenger wheel. The rear a/c drains out over the passenger side rear wheel. The coach has to be perfectly level for these drains to work and it is not unheard of for the these to get blocked up. When you find the exit point you may want to shoot some compressed air up the tube to clear it.
John and Mary Knight
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Old 04-15-2014, 05:07 PM   #5
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On mine the front AC drain line routes to the drivers side windshield post and down the front side of the firewall. It can be seen by opening the gen slide. It is just to the right and rear of the fuel cap area. I occasionally had problems with mine until I pulled it down and installed a clamp to prevent it from creeping up. it apparently had a high point that prevent water from draining out. I have not had an issue for several years now. A wet dry vac could be used to clear the line if plugged.
Wayne & Kathy
05 Alpine 40FDQS #75330 Towing 24' car hauler, 2012 Spyder, 2003 Harley FatBoy
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Old 04-15-2014, 05:07 PM   #6
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Locations vary but the problem is the same--dirt or critter stuff gets in the line. Rather than blowing from the basement end [debris ends up in cups or on your carpet], I'd suggest blowing from the AC end--just disconnect at the tee and blow. Usually a good [non-COPD] puff from the lungs is enough to get things flowing again....good luck...

Old Scout
2003 40' MDTS
Garden Ridge, Texas
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