I have a Sullivan's turbo fan in my barn approximately 3 years old. For some reason it the blades will not turn when I flip the switch. If I turn the switch on and off 3 times very fast, it will get going but turn counter clockwise (the wrong way). The only way to get it going clockwise is to insert a stick thru the fan cage, get the blades spinning clockwise then turn on the motor. I've taken it down, cleaned it and oiled the shaft but have not been able to fix it. Any ideas?