I have an AO Smith SQ1052 booster pump for the cleaner that, when turns on, hums but does not seem to spin or pump. I attempted to remove the motor so I can try to manually spin it. It has a square flange attached to the volute but as I tried to remove the 4 bolts to the flange, two of them seemed to be "welded" on and I cannot remove the motor from the volute. Could anyone share some knowledge and experience on how to troubleshoot this situation, how to attempt to possibly take apart and repair the pump, or possibly make the decision to buy a new booster pump?
Thanks and Happy President's Day!