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Discussion Starter · #1 · (Edited)
Hey Guys,
I’ve benefited so much from this site I decided I’d give something back. Even though its October in Texas it is still hot and humid. I’ve been running my AC every day and started to notice a funky smell like I left a gym bag in the car. That same day I went to grab a notebook that had fallen to the passenger side floorboard and it was soaking wet. I did some research and out that this was most likely caused by a clogged AC drain. I did some searching online and found some info on the older model Tundras and a black hose on the passenger side underbody that you can clear out. But my 2015 SR5 TSS truck did not have that. So, I tracked the small amount of water that was dripping back up to above the transmission area. The drain you need to find is located directly above the transmission on the center of the underside of the firewall. There is a small rectangular piece of plastic it’s about 2”x2” and on that piece is a small half-moon shaped hole where the water was dripping out of. I tried to stick weed-wacker string, wire, zip ties etc up in there to clear out the clog but it did not work. What worked was an air compressor with an air sprayer and a sharp pointed tip. I was able to get the sharp point of the air sprayer into the small opening and blow out the clog. About 2 cups of water came rushing out when the clog broke free. I fired up the truck and let the AC run for a while and no more leaks! Now I’m just drying out the carpet and trying to get rid of the smell. I’ve attached some photos below for anyone who may run into this.


Here is where the water is going to drip from on the passenger side floorboard. It will soak the entire carpet really quick.


Here is the drain location. It is located directly above the transmission. Dead center on the underside of the firewall. This is what you're looking for.


I tried poking a wire into the hole to clear it out but that did not work.


Here is the tool I used to spray out the clog with compressed air. I bought it at harbor freight.


This is the amount of water that rushed out when the clog broke free.


If you have any questions please let me know. I have videos and more photos in case I forget about this the next time it happens. Good Luck!
 

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Discussion Starter · #7 ·
Glad it worked but didn't you really blast it "IN"? Wonder if there is any way to apply vacuum?
It's very possible...however when the clog breaks loose water comes rushing out. I imagine some of the slime and gunk was flushed out when things opened up.
 

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Discussion Starter · #9 ·
Does that drain have a plastic or rubber flapped opening? I tried to use a can of A/C condenser cleaner but couldn't get the small plastic tubing to insert anywhere in that area.
No, it looks like it would but its all hard plastic. The only opening is that small half moon shape from the photos above.
 

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Discussion Starter · #11 ·
If you haven't had a gush of water come flowing out like you popped a water balloon.. my guess is that you haven't broken up the clog... try a thin wire to poke around first and then see if you can get a long thin air compressor extension to shove up there. Also, make sure your compressor has as much PSI loaded up as possible! good luck!
 
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