Gary, did you ever get to the bottom of this. If have exactly the same issue with a 2002 mini with auto-air con. Fan is on full or off. The levels of speed have no effect.
I've got exactly the same blanking plate where I expected to see the hedgehog resistor.
I'm about to go down the same path as you and completely strip the interior out to get to the motor.
Monday, January 7th, 2019 AT 5:32 PM