a/c drain line clean out

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Dec 12, 2009 | 01:32 PM

Dean Prevolos

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a/c drain line clean out

I noticed my carpet was wet on the passenger side and I investigated. I took the foot panel off and sure enough there is water running down over my electrical module. So I ask two mechanics how to unplug the ac drain line so the condensation will run out of the car. I was told to use my air compressor to blow out the tube. So I put the car up on a lift and took a look. I can't find the ac drain line, which I am supposed to blow out with my compressed air.

Can anyone tell me what I am looking for and if this is the correct way to fix my clogged ac drain line. My Corvette is a 1999. Thank you.

Last edited by Dean Prevolos; Dec 12, 2009 at 01:33 PM. Reason: add year Corvette

Dec 12, 2009 | 03:23 PM

byronhunter

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From: Kinston North Carolina

Read this thread!
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http://forums.corvetteforum.com/c5-t...ak-checks.html

Dec 12, 2009 | 03:34 PM

cliff_ford

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Quote:

Originally Posted by Dean Prevolos

You want the exact opposite of compressed air. You will only blow the blockage further in. If the drain is blocked within the evaporator housing, use a vacuum cleaner to suck it out.

Dec 12, 2009 | 05:28 PM

Dean Prevolos

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Thank you Byron for the link. I was thinking of removing the battery and going in from the top but figured someone from the Forum would come to my rescue. Thanks a bunch.

And thanks to Cliff as I thought the same thing. Why would I blow compressed air into the tube. So much for the "mechanics" whom I asked.

Always a pleasure to get the correct information. Thanks again, Dean.

Dec 14, 2009 | 12:12 AM

gtzy

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From: N.Canton Ohio

If that does'nt clear it, it may be deeper in the case like mine was.

http://forums.corvetteforum.com/c5-t...t-plugged.html

Dec 15, 2009 | 08:50 AM

Dean Prevolos

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ac drain line not found yet

I have printed all of the forum photos and have yet to find the 90 degeree drain line tube. My udder was clean, so I took the front wheel off and took the fenderwell panel off to look inside the fender. I found no drain line however there is a hole in my inside fenderwall, which looks like the spot where the drain line belongs. Is it possible that over the years a mechanic at the dealership may have removed the drain plug and not put it back? I did have a complete ac overhaul a couple of years ago. I put the car on my lift and do not see the drain line. I have read all of the forum advisories and am fearing the worst, that the line was not put back. My blower fan also has stopped running. I checked the fuse in the engine bay and the floorboard, and both are not blown. I am asking for some more advise before I throw in the towel. Any response is appreciated. Thanks, Dean.

Dec 15, 2009 | 11:04 AM

byronhunter

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Dean, the 90 degree AC drain is on the Firewall behind the Pass Side Cylinder Head. Best seen from the bottom. It won't jump out at you, but is there if you look close with a flashlite. Unless someone removed and did not reinstall it (not good). Keep looking!

Dec 21, 2009 | 07:09 AM

Dean Prevolos

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Found Drain line on Firewall-AC Fan switch out

Thanks as I was not looking on the firewall and I definetly could not see from under the car, as I had been told by two mechanics!

Anyway, I blew it out and it is clean, no bugs no clogs. I also found the udder which was also clean.

So I figure I am finished but when I put the ac fan switch on, the fan does not blow any air through the vents. So Icheck the fuse under the foot panel, it is OK. I am going to check fuse #27, as I read another thread that said this fuse controls the actuator to open and close the ac vents. I also check under the hood fuse box and all is well. There is one large grey square fuse in the hood fuse box that is labled for the a/c . How do you check that to see if it is working or am I looking at the wrong fuse?

Do you happen to know which fuse controls the a/c fan switch on the dash? Please advise. Thanks.