I replaced my MasterTemp heater coil this last winter and when I opened my pool this spring the blower motor was seized and would not turn. I was able to spin the motor from the blower side and by spinning the motor as I turned the heater on, the blower worked and the heater ignighted and works fine.My concern is a high pitched squeal which could indicate one of the motor bearings is failing of still frozen. How can i lube the blower motor bearings?