Novicebmwlover
New member
I have a 99 R1100 RT-P and I thought the aux fan was bad. But taking the bike apart and testing the fan, it worked fine. So now I suspect the temperature switch part number 17211342174. Everyone will sell me the part but I can't find a picture and location so I can test it. Can anyone help me on this? Several people have suggested just running a on/off switch to my handlebars and that is my fallback but I would like it if the the bike to work as designed first. Thanks