JKB is on the right advice. Take both of the end fan guards off and see if you can turn both of the fan blades. If they turn fairly freely then it is likely a start switch/electrical problem. If the blades don't easily turn then you have something bound up in the piston heads. It may need a rebuilding of the internal 'cups'. Worst case it is a bad motor bearing.
Last edited by Bill Cody; 07/02/15 08:54 AM.
