Does anybody have any information on where exactly this sensor is
> located? Can I effectively keep cleaning this thing, and how? Or is
> it better to replace it, and where can I find the part most
> inexpensively?
This came up recently on this group. You can see the thread here:
formatting link
Wilf Lee included links to some digital pictures showing the location of the switch, and the links still work for now.-DanD