Having a problem with water leaking into the passenger side of my car. I am driving a 1999 Honda Civic Sedan. When I have the AC on, the floor on the passenger side gets wet. Was told by a friend that it was possibly caused by the AC condensation drain line getting blocked. Does anyone know where this line is and how to unblock it? Any help much appreciated..

 

The drain tube (circled in red in diagram) comes from the A/C evaporator located behind the glove box and passes through the firewall in the engine bay. Check whether the drain is disconnected or clogged with debris.

 

Thanks for the info below. Blew the line out and the A/C seems to be working fine now. Appreciate you help..

 

Yup, sounds like what he said. Probably got calcified and clogged up. The evaporator sits in a little plastic tray with that tube attached.