BMW: Heater Fan, bmw 525i, heater fan

Question
Hi Josh!  The fan switch on my 91 BMW 525i only works in the '4' position.  It doesn't blow in any other setting.  All the fuses seem to be intact.  Any suggestions?  

Answer
Andrew,
 I'm no expert with the 5-series, but I have heard of this problem.  There is a circuit board that the fan connects to, and it's called the "fan sword", because of it's shape.

 Replace this and it should fix all your problems.

 Good luck,
 Josh