# Moisture in my a/c duct **URL:** \ **Category:** General Discussion\ **Tags:** fleetwood, cadillac\ **Created:** [April 12, 2015, 7:59am UTC](https://community.cartalk.com/t/moisture-in-my-a-c-duct/89632 "2015-04-12T07:59:17Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![moecrulylarry](https://avatars.discourse-cdn.com/v4/letter/m/c89c15/32.png) [@moecrulylarry](https://community.cartalk.com/u/moecrulylarry)\ **Post date:** [April 12, 2015, 7:59am UTC](https://community.cartalk.com/t/moisture-in-my-a-c-duct/89632/1 "2015-04-12T07:59:17Z")
93 fleetwood - bought new - sounds like water sloshing around behine the radio in the a/c ducts. also when fan is on, it blows out fog, like moisture in vents/ducts. is this a water drain/hole plugged up allowing water to flow where it isn’t suppose to. i can picture water flowing out of the vents in a heavy rain ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [April 12, 2015, 8:09am UTC](https://community.cartalk.com/t/moisture-in-my-a-c-duct/89632/2 "2015-04-12T08:09:45Z")
There is an AC drain located on the firewall, passenger side just above where the firewall bends to an angle to the floor boards. It is a short rubber tube that makes a 90 degree bend downward right after it comes through the firewall. You can blow some compressed air up the tube or use a flexible rod of some kind, I use a nylon cable tie to clear mine out.