When I turn on the ESC the fan turns but turns very slowly, it doesnt appear to be stuck on anything or dirty. The fan doesnt come on when driving the car, even if the esc reaches 150 degrees. Can I run it without the fan working or is there something easy I can do to fix it, or should I send it in?
Thanks

I had the same problem. I messed my fan up by spraying compressed air to clean the esc and the fan went south. I picked up a new case and fan for like 14.00 from castle. Its not too hard to change out.

Call Castle and explain the prob - these fans have been a prob. They'll take care of you.

I wouldn't be running without one unless you know for sure it never comes on.

Thats exactly what I did. I sprayed compressed air in there. I thought I was doing good! oh well at least its not too expensive of a mistake