Question about Hayward 1.5hp Pool Pump Motor Motor A O Smith Electric Pool Motor for 56j Frame Motors Ust1152

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Motor hums but does not pump - Hayward 1.5hp Pool Pump Motor Motor A O Smith Electric Pool Motor for 56j Frame Motors Ust1152

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Unplug the pump and spin it by hand. Then plug it back in and it may take off. If it does not you will have to have the pump rebuilt or replaced.

Posted on Jun 23, 2009


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Most of the motors have an internal device called a clixon that detects excessive current and shuts off the motor. It then turns it on again when it cools off. If you wait and wait and there is power for sure at the motor terminals and the motor is not even humming then there is a problem in the motor. If it hums for a few seconds and quits humming for a while then the motor capacitor is bad or the motor is bad. I hope this helps.

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If motor hums and does not rotate, the motor winding is bad.
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The pump lost vaccum, now the motor shut off and pump only hums.

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If you can hear the drain motor humming, look for a clog in the air gap. That's the silver dome on the back of the sink. If there's nothing there, you'll have to find the clog inside the bottom of the dishwasher.
Remove the bottom rack. Rotate the short tube that the lower spray arm is connected to about 1/4 turn clockwise and remove the lower spray arm. Remove the screens over the pump assembly. The hole to the drain pump is on the bottom right. If the motor hums, but doesn't pump, and there's no clog, the pump must be replaced.

If the motor doesn't hum in the drain mode, check for power at the pump with a voltmeter. the pump is behind the toe panel on the left. Reaching the terminals to take a reading may be difficult. you can disconnect the terminals from the pump to take the reading only if you use rubberized alligator clips to connect to the wires. If the motor has power but doesn't hum, replace the motor. If there's no power to the motor, replace the electronic control / timer.

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