I have had an issue for quite some time now with water leaking into the car when the ac is running. I have blown compressed air into the drainage port in hopes of clearing it but unfortunately that has not worked so far unless I have done it wrong. But the water only come in when the ac is running and it comes in from about the middle of the dash on the passenger side. I'm hoping its an easy fix I currently have the center console out and passenger seat out to either fix or look at what is wrong.

 

Since it is only when the AC is running, that really does suggest the condensation drain. You may want to run a piece of wire into it instead of compressed air.

 

So I figured out what it was turns out when we redid the heater core and drilled out the rivets. Turns out one of the rivets sits right in the passage way for the drain. Thanks to a post from 2012 of someone who completely redid their AC system and ripped the whole dash out to get to their condenser I was able to figure out that’s what it was. But we just filled the whole in with some sealant so it shouldn’t leak out that hole any more.

The spot on my car that was leaking

A picture from the older post that has the same rivet drilled out

 

I’ve got the same problem, did the sealant work?

 

yes! So far it’s worked what did was took a tube of caulk jammed it there put some in the whole waited maybe 30 minutes then put another layer on the outside to form almost a cap. So far it hasn’t leaked again.