I’ve found whatever posts I could for a replacement fan without much luck. Found one that did mention a replacement fan part number, so I ordered that and it is not what I need. Too small and only has 3 pins. Mine is a 4 pin (blue,yellow,red,black) fan, 4 1/8" between mounting holes. Fan that is in the unit is:
DC 12v 1.68w
Anyone able to get a source for me for this? Sure would appreciate some help!