Expansion Valve Question
 

I have a new 08 Beetle manual - the car constantly vibrates and/or hums very loudly. I brought it in and they are telling me is the refrigerant pushing through the expansion valve. Has anyone else ever heard of this. Sometimes it does it for over a minute while the air is off or on, when I turn off the car, when I start the car, while driving etc..

Any help would be great because this is my 4th VW and while it's my first Beetle I've never heard this happening before.

Thanks!

RE: Expansion Valve Question
 

i have had one do that before
but only with the air or defrost on