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Old 12-13-2011, 06:07 AM
71Rcode 71Rcode is offline
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Question Locating the evaporator drain

Looked under the car for 10 minutes and can't find the a/c evaporator drain. Picked up an expensive can of evaporator core cleaner from O'Reilley and can't wait to use it to get rid of the moldy smell coming from the vents !

Would one of you expert DIYers mind sharing a pic or describing exactly where this elusive drain hose / opening is?

Thanks in advance, guys.
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Old 12-13-2011, 07:58 AM
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Try running the AC for 5 minutes and see where the dripping of water is coming from.

Alternatively, have you tried replacing the cabin air filter yet?
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Old 12-20-2011, 07:10 AM
71Rcode 71Rcode is offline
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Thanks, ATR. Yes, I've changed the cabin filter multiple times... the moldy smell is about a year old and rears its ugly head in the winter.

I need to turn the a/c on when we get a warm day to trace the condensation, for sure. The day/week I posted my note, it wasn't hot enough to get any condensation from the a/c evaporator drain.
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Old 12-21-2011, 12:44 PM
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Keep us updated when you find it! I bought a can of the drain cleaner as well hoping to get rid of the weird chemical smell when I switch from hot to cold air.
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Old 01-12-2012, 11:22 AM
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Anyone? Too cold here to run the a/c and find the stinkin' drain! Just tell me which side, how far back, etc.. and when I find it, I'll take a pic and post it!
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Old 01-13-2012, 06:39 AM
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It should be between the center of the car and the passenger fender just in front of the firewall near the bottom iirc. Sorry I don't have anymore info then that as I haven't personally looked
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Old 01-15-2012, 07:57 PM
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I was under mine tonight and noticed it. It is a few inches to the right of the front flange on the catalytic converter.
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Old 01-23-2012, 07:46 PM
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Quote:
Originally Posted by GenXer View Post
I was under mine tonight and noticed it. It is a few inches to the right of the front flange on the catalytic converter.
Thanks GenX! I'll check it out.
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Old 04-23-2012, 05:47 AM
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Plugged evaporator drain?

Good post on this topic: http://www.driveaccord.net/forums/sh...t=56713&page=4

OK, finally got around to locating the drain hose. New question.... I used a product called Einszett Klima Cleaner got from amazon.com (
Amazon Amazon
)

Which is basically a foam cleaner to clean the a/c evaporator coil and coil housing. Per the instructions, you are to insert the clear plastic hose into the evaporator coil drain hose under the car. While I did this, it wasn't easy, taking a few minutes to work the plastic Klima cleaner hose up into the evaporator area.

The evaporator drain pathway seemed to be blocked along the way with some semi-hard material I had to work through.

My question: Shouldn't this hose be totally free and clear? The ID of the hose opening has to be at least 1/3 - 1/2" or so.

BTW, a pic of the evap drain hose from underneath the car - behind RH front tire.
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Last edited by 71Rcode; 04-23-2012 at 06:15 AM. Reason: update
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Old 04-23-2012, 11:27 AM
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Nice. I need to do this
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Old 04-23-2012, 11:54 PM
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Thanks for that picture. I will have to try and do that this weekend. I'm thinking the hose might have a filter so that dirt and water doesn't get in to the system since it's down so low to the ground? That might be a reason why the hose is also curved as well--harder for things to get in.
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Old 04-25-2012, 04:56 PM
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No, they are all just a simple hose, no filter. That drain hose is situated at the bottom of the evaporator case, so all the condensation (ideally) should run out. Your hose may be just hitting the evap core itself or a styrofoam liner (not sure how far you are trying to poke it in there). I haven't taken my Accord case apart but I used to design aftermarket evaporators. There usually isn't a great deal of extra room in there.
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Throttle body coolant bypass / PowerRev intake gasket
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