# Passenger side leaks in floorboard when it rains **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** isuzu, ascender\ **Created:** [March 12, 2020, 8:53pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914 "2020-03-12T20:53:21Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![criket9627](https://avatars.discourse-cdn.com/v4/letter/c/90db22/32.png) [@criket9627](https://community.cartalk.com/u/criket9627)\ **Post date:** [March 12, 2020, 8:53pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/1 "2020-03-12T20:53:21Z")
I am new and a female so bear with me if my words aren’t correct car talk. My 2007 Izuzu Ascender recently started leaking on the passenger side. I’ve pulled carpet back and I have traced the water up to the point where it is coming down the wall beside the dash, but that is as far as I can see water. There has been no repair work on my vehicle prior to the leaking. I’ve tried to narrow it down to 3 possible things. Gap at top of windshield slightly larger than driver side, or black molding around window is tore (been that way for 2 yrs tho) or gap at bottom of windshield under cowl grille. I was told there was a drain hole that may be clogged located behind cowl grille. Where would this be located? anything else I can check? ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [March 12, 2020, 9:42pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/2 "2020-03-12T21:42:23Z")
On the firewall in the engine compartment there is a drain for your air conditioner, that maybe plugged. Usually you can see it under the hood. Some cars must be done from below. ---
**Author:** ![criket9627](https://avatars.discourse-cdn.com/v4/letter/c/90db22/32.png) [@criket9627](https://community.cartalk.com/u/criket9627)\ **Post date:** [March 12, 2020, 9:58pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/3 "2020-03-12T21:58:31Z")
Will this leak if I have not been running my A/C? have only run my defroster for the past couple weeks. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [March 12, 2020, 10:14pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/4 "2020-03-12T22:14:55Z")
Besides a plugged a/c drain, there are some other possibilities: -plugged drain in the air inlet at the base of the windshield -leaking windshield seal -plugged drain in the passenger door causing water to leak into the car -plugged sun roof drain if you have a sun roof ---
**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\ **Post date:** [March 12, 2020, 11:31pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/5 "2020-03-12T23:31:08Z")
The a/c runs when the defroster is on. ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [March 13, 2020, 12:28am UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/6 "2020-03-13T00:28:36Z")
If the AC drain is clogged, rainwater can collect in it and overflow into the passenger side floor. I have had it happen twice in car washes. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [March 13, 2020, 12:32am UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/7 "2020-03-13T00:32:13Z")
Pour water on the right side of the windshield and see if it leaks into the vehicle. If the A/C drain were plugged the water would drip from the HVAC housing, not the A-pillar. ---
**Author:** ![criket9627](https://avatars.discourse-cdn.com/v4/letter/c/90db22/32.png) [@criket9627](https://community.cartalk.com/u/criket9627)\ **Post date:** [March 13, 2020, 2:55am UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/8 "2020-03-13T02:55:07Z")
thanks for all the responses. I will be trying them over the next few days, of course it started to rain right after I posted so will check in between rains. Will report if I locate. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [March 13, 2020, 3:51am UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/9 "2020-03-13T03:51:44Z")
I had a similar sort of leak on my truck caused by a leak at the top of the windshield seal. Given mine is an ancient truck, I effected a repair using some paraffin wax and a hair blower. Hasn’t leaked since. the advice above to run water over the windshield and roof gutter areas while looking w/a flashlight below is where I’d start. I used a garden sprinkler on top of the roof. ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [March 13, 2020, 12:27pm UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/10 "2020-03-13T12:27:34Z")
> [@George\_San\_Jose1](#): > > I used a garden sprinkler on top of the roof. How would you know if the leak is at the top or bottom or HVAC air intake ? ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [March 14, 2020, 2:48am UTC](https://community.cartalk.com/t/passenger-side-leaks-in-floorboard-when-it-rains/160914/11 "2020-03-14T02:48:14Z")
In that case the leak was the seal running along the top of the windshield.