When stationary I sometimes hear a noise that sounds like a flap being closed by a motor. I don't notice it when moving but doesn't mean it's not there.
Just wondering what it is.
Do you have climate control. If yes its probably a flain that system, might be worth checking if the air direction stays where it is, but it could just be adjusting the hot cold inflow / mix.
Do you have climate control. If yes its probably a flain that system, might be worth checking if the air direction stays where it is, but it could just be adjusting the hot cold inflow / mix.