Ventilation splitter will not move between defrost, floor, and vent

SOURCE: Defroster & floor blowers don't work but front facing vents do

There are what they call mode door's these days they have a electrical motor that turnes the door to different posistions...sounds like yours is become broken. It would depend on your expertise in the ac & heating system area to replace the part. Sometimes easy and most of the times the dash has to be removed.

Marvin

• 85242 Answers
• Posted on May 19, 2009

SOURCE: vent selector inop

U have either lost the vacuum to the mode selector switch (in the dash control) or the vacuum mode selector switch is leaking in the ac/heater control in the dash, u can usually hear a hiss if it is leaking. the vacuum source is the engine, a small hose runs through the firewall on the passenger side to the switch from the eng vacuum source.

SOURCE: ac only blows out floor and defrost vents 95 camaro

Could it be a possibility that your switch is broken to that setting. Try popping off the knob with a screw driver, taking pair of pliers and twisting the knob. Feel for it switching settings.

SOURCE: 1981 corvette air conditioner ventilation

hi

this is because
1.there is some blockage in the line comin up and to sides.
2.the selector switch is not properly functioning. the flaps got stuck and it may allows only air to pass through the floor vents.


please vote me if my answer was useful to you.

SOURCE: Heat only blows out of defroster vent and dash

ck bleed door to make shore it working or vac hose going in to dash from out side