How To: Clean your AC drain if water is spilling into your car

Clean your AC drain if water is spilling into your car

This next tutorial is going to be showing you how to take care of a problem that is very common amongst drivers. If water has ever spilled on you from inside your car, it's probably from your HVAC. When you use your A/C, condensation builds up as well, and this usually goes down a drain. But if it gets clogged then you might have a problem.

This tutorial is going to show you what you need to do in order to clean out the clog to prevent any accidents from taking place again. So good luck, be careful, and enjoy!


ok, So my ac line is not clogged. Matter of fact it runs out very fast under the car when the ac is on. I still have wet carpet on the floor only, on the driver's side and the back seat driver's side floor only. No water under the driver's seat, just where you put your feet. Stumped here?

What became of that mine is doing thatvnow

I have this exact problem. It stinks in my suv after running the air. And water is only driver side back seat floorboard. Did you figure out why?

my car 2003 Impalia the blower motor keeps blowing fan resisters leaks water on floor on passenger side when there's lots of rain when car is parked no leaks when can't find any leaks anywhere

I have the same issue with my Volvo S 40 would I be able to do the same thing I'm getting water backed up into my driver side back floor panel the water is draining constantly

Looks easy enough. I have my 2006 Jeep commander up on ramps and the air hose in hand. Now if I could only find the drain line. Please help!!!

Fixed my 2013 GMC Terrain straight away! Thank you for posting. For those of you with a Terrain, the drain tube is located on the driver side, made of black rubber and sort of looks like a smoking pipe stood vertically against the fire wall.

Well when your a/c is clogged then you have mould in there. It's a health hazard and causes a very bad odour when the a/c is turned on or off. You should talk how to clean that problem but please don't tell us to use just these cheap sprays...

Change your cabin filters. It will also help with odors and the drainage

Is there a way to clean the drain hose out if you don't have an air hose to use?

I just cleaned out my a/c line using my shop vac , getting about an inch of water and sediment.

I don't have this problem personally but a friend does I was just talking to him after reading these post. He doesn't have a air hose and can't make it to my place to have me fix it. I can tell you what I told him. I suppose you could buy a can of air duster for cleaning electronics and put the nozzle in the tube. Use some duct tape to create an airtight seal so when you spray the air and it won't just deflect off the clog and come back out the end of the hose. I do not believe the can will have enough pressure to dislodge the clog without this measure. I'm not entirely sure this will work but it's worth a try. Afterwards I would also use some Lysol to clean your system. The clog could be caused by mold and could be harmful to health. There is a video on here that shows how this is preformed. I hope this is helpful.

I have a 1991 Chevy s10 reg cab and the driver side floor is always wet even when it does not rain. It might be due to the ac leaking in. From what I've read here. If anyone has this same issue in their s10 please drop me a line. Would like to hear how you resolved the issue.

ok so will this also help with getting my defroster to work as well?

Sadly no pretty sure it won't fix defroster.
That's gonna be either a switch or a vacuum line....

First things first what's year make & model of vehicle?

Does the rest of your switches work correctly (vents, AC, heat, vent air,etc)? If the problem is your selector knob (it won't switch to or off defroster) I'd start there. If it blows air but doesn't defrost the window check your AC compressor (as that has to run to take moisture out of the air blowing onto windshield).

I'm no expert by ANY means but I'm pretty dang good with vehicles.
Lemme know if you need me to help troubleshoot or direct you where to look.

Your getting water in the back seat floor because you most likely have Styrofoam or some other noise/heat reducing insulation under the carpet in the front. Therefore preventing it from reaching the carpet. Can of duser will work to dislodge the clog, stick the tube in and pinch it off or make a hole in a pencil eraser and stick the tube through it then in the hose and blow it out. Unless you can remove the algae it's just gonna stop back up.

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