2011 GMC Acadia "vents blow actuator defrost" Questions

blow it out in the front sounds like the blend doors are stuck shut. when you switch it to defrost does the air come out the windshield vents? Next would be, Do you have dual air? Driver and passenger

...have broken loose from blower motor? There could be an actuator problem under the dash? If actuators are vacuum controlled and vacuum is lost, it might default to defrost, only blow out defrost

...blow anything thru vents. There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that ...

vents. Is this a vent door actuator problem? If so, is actuator behind stereo on this model? There is no vacuum to the controls. Look for a vacuum hose that is no longer connected to the engine intake

vents won't blow hot or cold air. Comes from defrost and feet when you put fan on. I can't get the fan to blow heat or ac from vents. Blows through defrost and feet instead. Can feel air from vents, ...

referred to as a mode actuator or blend door actuator. This actuator controls where air/heat will blow from (defroster vent, forward vents, floor vents or combo, etc.). Good luck. Ron @ Speed-O-Repair

...vents. I was told this is a safety mechanism. I have already replaced the vacuum cap behind the switch, thinking there may be a clogg. Do I need to replace the vent actuator moter or could this be an ...

vents blow. We have aligned the gears and they only go together oneway. The motor gos only one way so I am not sure where to go from here I did the reset with the fuses no luck. HELP Thanks Dave. Most

...blows through the defrost. When set to blow through the vents, it does half and half (vent/defrost). The temp control works. Any ideas? The heater blend door actuator (motor) is faulty.Replace ...

...vents but seems to blow mostly through defrost and less and less through the proper vents Vacuum controls this circuit and leaks will cause blend air door to default to defrost. Check for bad check ...