Ford F 150 Cowl Drain Leak Diagnosis and Repair: Right Front Floor Leak

2021 and up Ford F-150 and other F-Series cowl leak repair. Causes a right front floorboard leak. Here is how to find it and how to fix it. Likely works for other years as well. #ford #fordmotorcompany #f150 #fordf150 #fseries #automobile #mechanic #waterleak #waterleakageincar #diy #interesting #handyman

[@rafaelhernandezjr7915]

Thank You, Thank You, Thank You,! I have had this issue with my 2022 F150 almost since the day I got it. There are tons of trees on my street and I have this issue all the time. The first time it happened in 2022 (3 month old truck) the dealer cleared it and replaced my blower motor. They had to remove my carpet for cleaning. The second time (about a year after) I caught it early so the dealer just cleaned my drains. They won't clean them for free again. So I am happy I found this video so I can take care of it myself. Good job!

[@davidchivatero4306]

Thank you!!! I get a renewed sense of hope for mankind when someone is kind enough to share detailed info like this! Great video..dealership wanted me to drop off truck for a MONTH - your video solved my problem 😊

[@ytgma]

Had this exact problem last year on a 2022 F150 and it just reoccurred after heavy rain yesterday. Stumped me for a long time. I could find nothing on the internet at the time about it. Even had Safelite check a windshield replacement that they had done because by coincidence the leak started soon after. But it was not their fault. The first symptom I got is no airflow through the vents because the cabin filter got soaked and would not allow airflow through it. Finally one day last December I had the idea to put my phone on video with flash on and stick it up through the fresh air vent door opening from the inside that goes out to the cowling. (recycle must be off for this vent door to be open for access ) The video revealed standing water down in the lowest spot on the right, I cleaned this area out with my shop vac by adapting a smaller hose to it and feeding it down in there. Worked till now when the holes have become clogged again. So happy to find your video because I did not know that the drain hole under the hood was visible. And I prefer your clean-out method over mine, easier. I had thought I would have to disassemble the firewall or fender wall or something to get to the drain holes. I say drain holes plural because I’m pretty sure there’s a lower one than the one you point out. That point is about 2 inches I would guess above a lower drain hole. Today because of your video I used an about 18 inch crochet needle which I used many years to fish walls to run wires and cables. This time I used it in the hole that you showed. Then I bent it a little bit and stuck it up in, through the inside vent door and down into the cowling. By rotating It in different positions and poking it down in there I was able to feel it go in the lower hole. Ran some water in the cowling while doing all this. Cabin filter now setting in the summer drying out. Fingers crossed. Btw, last December I posted about this problem under the title Mystery Leak on f150forum.com , under GAllen ( there is a photo posted there of the inside of the cowling) One other comment: I never had water dripping on the floor mat, at least that I noticed. Just the air flow through my vents practically became nonexistent due to the soaked cabin filter.

[@briandunnum]

Thank you. I just looked at my 2022 f150 and sure enough that hole was plugged. Cleaned it with a wire and over a cup of water came out.

[@SealofPerfection]

I might change the cabin air filter now, too. If it was getting wet, might mildew.

[@MrDshprints]

Thanks for this video. I believe I have the same on my 22 Tremor. After each rain, water goes through the HVAC intake on to the cabin filter. I just blew some compressed air through the opening you were referring to and it seemed to remedy it.

[@SealofPerfection]

Awesome. I think there are going to be a lot of these as these trucks get a few years on them

[@derricklacey6843]

I have this issue on the drivers side of my 2020 f150. I'm going to try this and see if it works.

[@SealofPerfection]

Let me know if this is your problem