I had an A1 Runner Reverse thermal continually on a Sports Tuned motor (geared low, I mean a TEU-101BK didn't get ANY heat on it) took it back, got another one, did the same thing. Now this is an ESC with a "19 turn limit". Ended up having the LHS accusing me of not wiring up my car right, got a Futaba 20 turn ESC, no dramas since.