My vent flaps seem to be not working. I can't get the flap to open in the passenger side of the car to get heat.
The seperate switch works for the deforst.
I wonder if this could be a vacuum hose or vent Flap control moter?
Also are the vacuum hose's for the heater A/C visable from the top of the engine.

Thanks

 

Probably stepper motot linkage, check your PM

 

What does PM stay for

 

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