Inconsistent problem
Will either be the start capacitor (in the box on top of the motor) or something binding the impeller or potentially both.
There is a fan cowling on the rear end of the pump try this;
- Turn the power off
- Remove the cowling
- See if the fan allows you to spin freely/easily the pump
BE SURE nothing could become entangled in the fan
- Turn pump back on
- If it starts, probably something on the impeller side
- If it doesn't but will start with a little turn of the fan probably the capacitor. Get a new one from Jaycar or RS components
Remember to put the cowling back on safely.
SOURCE: my hayward pool pump started making a humming
check impeller by turning shaft with pliers sounds as if its stuck do this while of and try to restart
SOURCE: Pump hums and does nothing or no noise at all.
pump starter solenoid problems.
Some-times you can lightly tap and will un-frezz it.
BUT will have to replace soon.
SOURCE: pump motor makes burring sound then turns itself
could be the start or run cap. its a hard pump to find parts for
SOURCE: POOL PUMP MOTOR MAKES HUMMING NOISE BUT WILL NOT START
Thank you for posting your question here on Fixya.com.
It could be the pump is bound up but it is more likely the motor is failing. It may be a small part such as the capacitor or the starting switch, but could also be more severe such as the winding itself. You will also want to examine the shaft where it passes thru the pump and motor and look for signs of rust from a pump seal leak.
If you are not familiar with testing these parts your best bet would be a local electric motor repair shop to see if the motor can be repaired or if it would need to be replaced. They should also be able to ensure there is no pump damage. Otherwise please reply with specific questions about what you find for more direction.
If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!
John
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