Replace a pool pump motor when it hums but won't spin

If your pump hums and doesn’t spin, replace it.

That humming noise means the start capacitor or the motor windings have failed. You can sometimes replace the capacitor, but it’s a band-aid. The motor is telling you it’s near the end.

Other clear signs: loud screeching or grinding (bad bearings), the breaker trips every time it tries to run, or you see water leaking from the motor housing. That last one means the shaft seal blew, and if water got inside the motor, it’s done.

When should you replace? If the repair cost (parts + labor) is more than half the price of a new motor, just swap it. Also, if the motor is over 7 years old, replacement is almost always the smarter move. You’ll get better efficiency and fewer headaches.

Don’t wait until it completely dies mid-summer.