Since you posted the condenser fan pix I am guessing that is what is going. I put my money on the fan blade having too much pitch. The blade is matched to the motor ... at it's rated speed. If you are running 20% over speed, the blade is working beyond the design load. Try the next lowest pitched fan blade, maybe two sized down it it is close.
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What is the current on the fan when it is running?
[This message has been edited by gfretwell (edited 02-09-2006).]
