About a month ago, my blower motor was running with the ignition off, I replaced the FSR and was back in business. Now, I have had my battery drained over the last few days, I hear a barely audible whirling from the dash by where the "cup holder" is (the small ventilation orifice on the right, passenger side). Anyone have any idea what's wrong this time? Thanks.

Tom V.
'99 540i-6