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How do you fix a plugged ac drain line on passenger side floor of 1997 jeep grand Cherokee?
Wiki User
∙ 14y ago
The drain is inside the frame of the Jeep. The only way to clear the drain is to drill a hole from the inside. I was lucky, in my used '97 jeep someone had already done it and I just had to remove the screw and use a piece of coat hanger to clear the line. Pull back the carpet on the passenger side front under the dashboard. the drain is behind the center of the round plastic drain. Be prepared with something to catch the water after you drill. It will all come spilling out. Slide the straight length of coat hanger in the hole and it should clear the line. If it works the backed up water will start pouring out of the frame at the front of the Jeep. Use a screw with a large head and some caulk to close the hole. What a stupid design. I will never ever own another Jeep. I had the same problem with my 95 GJC, I couldn't get the wire to clear the clog. I used the same procedure and used an air compressor, 150psi, with a blow gun to clear the clog. I have found I need to do this about every other year. Hope this helps.
Be sure to push the wire straight through towards the firewall. If you push up at an angle you will enter the drain channels ahead of the clog and not clear the drain. Push straight through and it will have a better chance of getting to the clog. ANSWER
This is a very common problem that has resulted from typically poor engineering. On traditional vehicles the AC condensor box drains to the ground via a black rubber tube. Because the condensor pulls nasty air out of the passenger compartment in the form of humid, dirty air the condensor box gets full of really dirty stuff which clogs up the drain hole. Because the Jeep is a unibody the condensate (dirty water) drains into a frame member which denies access to blow the hose out when it gets clogged with "mung" (the official word for nasty pasty smelly stuff). Yes, you can do as others have suggested and drill a hole in the bottom of the evaporator box and hope for the best but this is not fixing a problem but rather putting off the inevitable: pulling the dash completely out in order to clean the evaporator box and replace the styrofoam liner inside the box. Be aware that if you decide to do this repair down and dirty with a drill there is also the heater core in that box and if you puncture it you're really screwed. Because the correct repair will cost you over $1500.00 at an AC repair shop it might be best to consider the economics of keeping this vehicle and then the ethics of selling it to some unaware schmuck during the non-AC season. There are some really good in-depth postings about this issue, several by me, here in Wiki that address this issue technically and without snarky remarks. Check out the archives.
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∙ 14y ago
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If its on the passenger side, it is probably the air- conditioner condenser drain plugged up and this is not good. From what I have read this is better left to a qualified Jeep mechanic. when the drain gets plugged up, the water that normally drips into the body, frame area collects on the passenger side floor. Unless someone knows a cheaper fix. Its 1000.00+ at a dealer.
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