This week I started having a noise like this with my Model S when preconditioning (i.e., preheating) in the morning (it is still cold at night here). Mine is essentially the same but a little more constant. As soon as a door opens the preconditioning stops and this noise stops with it. Has anyone had this successfully taken care of? I have a service appointment coming up, and I'd like to get this addressed too if I can.