Variable speed pump humming but not spinning up, any ideas

Started by tampapoolguy · · 1 reply
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#1
My own pool this time, not a customer's. Went out this morning and the pad's got that hum going, motor's warm, but the impeller's not turning and flow's dead at the pad gauge. Killed power, waited a few, powered back up, same thing. It's only three years old so I'm not thrilled.

Not an electrician so I'm not touching the capacitor or anything inside the housing myself, that's getting called in if it comes to it. Before I pull the trigger on a service call, anybody run into a VS pump doing this that turned out to be something dumb like a stuck shaft from sitting, or debris jammed behind the impeller. Trying to figure out if this is a ten minute fix or I'm buying a new motor this week.

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#2
Humming with no spin usually points to a seized shaft or debris behind the impeller before it points to a dead capacitor, honestly, worth pulling the pump basket and trying to turn the shaft by hand with power off before you call anyone. My spool's pump is tiny compared to what you're running but same logic applies, stuck is way more common than fried.