When I switch the air flow mode to or from "windshield", I can hear a creaking/squeaking noise coming from the windshield's defroster outlets. It only lasts a second, so I know it's coming from the vent flap trying to open/close. This started happening only recently when the weather started getting cold.
Where do you guys think the sound is coming from? The blend door actuator or the vent flaps? I don't hear any noises if I'm switching between the face or foot vents, so I think maybe the actuator is fine.
Does each vent flap have its own actuator or are they all controlled by the blend door actuator?
If I wanted to lubricate the vent flaps, can I get to them without having to disassemble the dash?
The car is a 2013 Nissan Maxima, and the vents seem to be controlled electrically as opposed to the old school cable controlled blend doors.
Here's a pic of where the sound seems to be coming from: https://i.stack.imgur.com/rH4xY.jpg