Question about Lexus IS 350

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I have a clogged ac condenser drain line on a 2007 Lexus IS350. Where is the drain located so I can blow it out. I put it on a rack and looked but could not find it. I'm assuming it goes right out from the consender housing throught the firewall and that I should be able to see it from below. Please advise where the end of the drain is located and how I can find it. Thanks.

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  • mgraham652 Aug 06, 2010

    I got under the car and could not locate the drain, as I wrote in my question. Even though I knew it is on the passenger side firewall, and I looked at length for it, I could not see it. What is nearest the end of the ac condenser drain line I could use as a landmark to find it, because I have looked and looked and just cannot see it (from under the car, on a lift)? Where, exactly, is the a/c drain line? Thanks.

  • mgraham652 Aug 09, 2010

    Thanks. That's exactly what I needed.

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  • Master
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HI. The drain is the only rubber drain hose under the front of the cabin(passenger side). This hose runs right by the exhaust, make sure it's not plugged. You can blow compressed air up this tube to unclog it or stick a long slender nail up the tube. Compressed air works better. Look for a 1/2 inch size rubber tube under the car in the section i stated. above.

Posted on Aug 06, 2010

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  • Lexus Master
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For HVAC the tube I think is the drain tube is black, about 3/8" ID, with some bends in it, you need removed the kick panel by the passenger footwell, and could not see anything you could do there.

it's probably condensate from the evaporator thats draining onto the floor on the passenger side. Check the drain tube thats on the firewall under the passenger side and make sure it's not crimped, etc that would prevent the condensate from dripping out onto the ground. Run the a/c and look under the car on the passenger side and see if you have water dripping out the drain tube, if not, it's probably clogged up somehow.

The drain tube connects to the evaporator housing and directs the collected water that condenses on the evaporator core through the firewall to drip on the ground . You can see the drain tube if you get under the car near the firewall on the passenger side and you should have water dripping out of the tube with the a/c running. If you're not seeing any water dripping on the ground, the drain tube is either disconnected or clogged up and in either case the condensed water will drip onto your passenger side carpeting instead of on the ground.

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Posted on Aug 06, 2010

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