I’m seeking help on an overheating pool motor problem and any suggestions would be greatly appreciated.
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Here’s the problem: The booster pump motor (PB4-60 which I think was 2 yrs old at most) that supplies water to my Polaris pool cleaner reached the point where it would hum without spinning and then rapidly overheat such that the internal thermal device would trigger and shut the motor down. I replaced the start capacitor to see if that would get the motor spinning without success.
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So I got a new motor and installed it today.
I have confirmed that the new motor: is properly wired for 240v; the line voltage at the motor is 240v; at 240v, the motor label shows the motor draws 6.4 amps (I have not measured actual current draw); the motor is on a dedicated 20 amp circuit (two 10amp breakers ganged together); the supply wire is 12awg; the wire ends and the motor terminals are clean and bright; the wire to terminal connections are clean and tight; the 3/4hp motor is rated for continuous operation; ambient temperatures have not been high enough to be outside the motors rated operating zone; and the motor has a start capacitor so polarity doesn’t matter so I’m confident I have it wired correctly. Still, shortly after start up the motor is too hot to keep my hand on it.
So what am I missing here? Is too-hot-to-touch the normal operating temperature for this motor and I just never noticed until this issue came up?
Again, I’d be grateful for any ideas.
———
Here’s the problem: The booster pump motor (PB4-60 which I think was 2 yrs old at most) that supplies water to my Polaris pool cleaner reached the point where it would hum without spinning and then rapidly overheat such that the internal thermal device would trigger and shut the motor down. I replaced the start capacitor to see if that would get the motor spinning without success.
———
So I got a new motor and installed it today.
I have confirmed that the new motor: is properly wired for 240v; the line voltage at the motor is 240v; at 240v, the motor label shows the motor draws 6.4 amps (I have not measured actual current draw); the motor is on a dedicated 20 amp circuit (two 10amp breakers ganged together); the supply wire is 12awg; the wire ends and the motor terminals are clean and bright; the wire to terminal connections are clean and tight; the 3/4hp motor is rated for continuous operation; ambient temperatures have not been high enough to be outside the motors rated operating zone; and the motor has a start capacitor so polarity doesn’t matter so I’m confident I have it wired correctly. Still, shortly after start up the motor is too hot to keep my hand on it.
So what am I missing here? Is too-hot-to-touch the normal operating temperature for this motor and I just never noticed until this issue came up?
Again, I’d be grateful for any ideas.
