Cold air leaking with closed center vent
I think I have a center vent issue. I had it last winter now I want to fix it.
Even after I shut the center vents off, completely shut off the center slider lever and the side window vents, turn the temperature knob between the center vents to warm, I get cold air seeping out around the vents. I also get some cold air seeping out around the large dash grill even though off. I almost need to wear gloves to keep my hands warm!
I am guessing an actuator/stepper motor is not turning off a vent flap as it should? If so, which one should I check and what is the best way to approach the problem? I understand there are many actuators and some are in difficult places to reach.
Thanks in advance.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment