Screaming gale blowing through Air con fan... only found out where it was coming from by slightly opening the window on a rare sunny day. Opening Window switches off the Fan and then there is no noise.
It started in September last year and sounded like dry Leaves rustling for a few days then settled to a high volume whistling wind noise.
Is there a simple way to fix it or is it a dismantle in garage job?
For 3 months I thought the sound was coming from the rear nearside.  Offset your Carbon emissions by boycotting Baked Beans and all Green Vegitables.