A/C flooding passenger floor - Dodge Cummins Diesel Forum
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post #1 of 23 (permalink) Old 08-18-2015, 04:21 PM Thread Starter
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A/C flooding passenger floor

My A/C is draining most of its condensation into the cab and the passenger floor. The carpet is soaking wet. What do I need to look for/fix as I investigate this problem? Is there a drain to the outside that can plug off?


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post #2 of 23 (permalink) Old 08-18-2015, 07:56 PM
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are you sure its ac and not coolant? if ac there is a drain around the turbo area that might be plugged. if not ac the heater core needs replaced

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post #3 of 23 (permalink) Old 08-18-2015, 09:23 PM Thread Starter
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I've had the heater core go out and leak on the floor. This is water. At times, I have to idle 12 hrs at a time to run the A/C while I'm at work.

'97, CC, LB, 341 ht3b twins, BHAF, SDX 5x16, DDP comp gsk, case dozer breather,
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post #4 of 23 (permalink) Old 08-19-2015, 01:05 PM
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Relatively common issue. There is an article in the 94-98 tech section that shows how to address it.

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post #5 of 23 (permalink) Old 08-19-2015, 08:10 PM Thread Starter
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I read the tech article, but it just shows most of the same steps I went through to change out the heater core without saying what was the cause of the water pouring in the cab. Guess i'll just tear it all apart as soon as I get my other maintenance projects done on my 04.

'97, CC, LB, 341 ht3b twins, BHAF, SDX 5x16, DDP comp gsk, case dozer breather,
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post #6 of 23 (permalink) Old 08-19-2015, 08:52 PM
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My bad, it wasn't in the tech section. But it should be!

Dodge Ram A/C Drain Line Installation &raquo Motor Mayhem

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post #7 of 23 (permalink) Old 08-19-2015, 09:26 PM
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While i am not familiar with the airbox on your truck, i have worked on a lot,of AC systems. With a drain problem i look for a bad outlet tube, and not finding one I go underneath with a flashlight, safety glasses, and a rifle brush brazed to a coathanger wire and clean it out. Once that is done, i use air and a brake line to blow a bottle of Listerine in there to kill the fungus garden. Smells much better with the new mint flavor. Any alcohol will work, but if you use Tequila, expect to do the breathalyzer test.

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post #8 of 23 (permalink) Old 08-20-2015, 01:34 AM Thread Starter
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Thanks dauntless, I knew there should be a drain I could check before tearing it all apart.

'97, CC, LB, 341 ht3b twins, BHAF, SDX 5x16, DDP comp gsk, case dozer breather,
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post #9 of 23 (permalink) Old 08-20-2015, 01:37 AM
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There is a drain that's more than likely plugged. I don't know on the ram but on the chevys they are on the passenger side firewall, I'd check around the turbo.

Current: 97 12v nv5600 ext cab flat bed, 4" lift with 315mts, 3 1/2" straight pipe w/4" tip, boost elbow, K&N cold air intake, banks big head wgate, 4k gsk, modded and tuned afc, no plate, egr delete, isspro pyro boost and fuel.
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post #10 of 23 (permalink) Old 08-20-2015, 01:38 AM
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My bad didn't see this has already been answered. Isn't it really hard on these trucks to idle like that?

Current: 97 12v nv5600 ext cab flat bed, 4" lift with 315mts, 3 1/2" straight pipe w/4" tip, boost elbow, K&N cold air intake, banks big head wgate, 4k gsk, modded and tuned afc, no plate, egr delete, isspro pyro boost and fuel.
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post #11 of 23 (permalink) Old 08-20-2015, 01:48 AM
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Hot idle's fine, it's the cold idle that's problematic.

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post #12 of 23 (permalink) Old 08-20-2015, 02:57 AM
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Oh I was not aware of that, Thank you. I thought cylinder washing would happen at any temp. I would assume he has his idle bumped up a little either way considering how much it can help with ac. Is cylinder washing not an issue as long as the engine and coolant are at operating temps because it will burn all the fuel at idle? Or is cylinder washing not even the issue and I'm just completely misinformed?

Current: 97 12v nv5600 ext cab flat bed, 4" lift with 315mts, 3 1/2" straight pipe w/4" tip, boost elbow, K&N cold air intake, banks big head wgate, 4k gsk, modded and tuned afc, no plate, egr delete, isspro pyro boost and fuel.
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