Fan will not rotate with blades attached, take blades off and fan rotates good in all 3 speeds. Even if I turn by hand then turn on, blades will not turn. Everything else works, lights, remote and pull switch. Blade motor sounds and runs greart without blades, HELP

With blades attached can you spin the fan by hand without obstruction or friction?

I second B's question. How long does it take to spin down, when you spin it by hand?

General ceiling fan troubleshooting and help FAQ- Ceiling Fans N More