No air is blowing out the vents of my nissan titan. Not blowing ac or when heat is on. I noticed this at car wash and water came In on floor. AC worked fine the night before. Please help.

SOURCE: The air cond blows out of the floor instead of the vents

i dont know if you have checked the vacuum lines underneath the dash but my truck was doing it after i replaced the heater core and i come to find out that it was the vacuum line that comes through the fire wall that was disconnected. after i hooked it back up it started working right again.

SOURCE: 1998 Mustang - AC blows only through Defrost vents

You probably have a vacuum leak on the passenger side. its a small plastic hose some times they come unpluged from the engine. or brake.

SOURCE: 98 Olds LLC - AC works but fan air does not blow

If you have a late model GM car and the system is controlled electronically the blend door actuator becomes weak. When this situation occurs it will not move the air direction door inside of the heater/air conditioner plenum. in your case not to the vents Replace the actuator with new and recheck the system. i hope this helps

Marvin

• 85242 Answers
• Posted on Sep 04, 2009

SOURCE: heat blows out driver vent when ac on

this problem is caused by a defective air temperature control blend door actuator motor, it is about center of dadsh in air ducting, it moves the door that diverts air for cold from ac or hot from heater, you must remove the dash to repace it, about a 15 hour job fotr a home mechanic with a factory repair manual, nearly imposs without one.

SOURCE: 2000 Dodge RAM no HEAT/ New heater core / AC evap.

There is a actuator on the right side of your leg while sitting in the drivers seat under the dash. It has a plastic rod for actuation manually actuate this diverter and should be the problem.