You need to check and see if the shaft going from the motor to the pump is turning. You can do this by adding a small piece of white electrical tape to the shaft (while the motor is unplugged and not running or you could injure yourself). If the shaft is turning then the pump is loosing prime and will have to be replaced. If the shaft is not turning, it could be the bearings are locked up. You could try oiling the bearings. They are located on either side of the motor. Not too much, or you could damage the motor. If this works then you should probably budget for a replacement next year as this is usually only a temporary fix. If it doesn't loosen it up then you will have to replace the motor. I found it cheaper to replace the pump and motor as a unit from the pool supply store rather than trying to purchase a new motor from a motor supply store. Check prices before making your purchase. Hope this helps.
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