My pump seized over the winter. I was able to free it by spinning the impeller. It is working OK now, I have not noticed any increase in noise level or decrease in output. The pump is 4 years old, it is only used in the summer, 6 months per year. I did follow proper winter closing procedure by draining out all the water. This is the 1st time that it happened. There is no leak around the motor. Does that mean the pump is about to go?