Hayward sp4007x10 only humming

[Gimpin]

I found today that my pool pump (Hayward sp4007x10) when it is switched on ... if I switch it of and on a couple times it will start. Is the pump going bad or could this be something more simple.

[CarlD]

More likely either the bearings are going bad, or the starting capacitor is. I'm not sure but we have members here who know better. Do you hear a bearing whine when it starts?
It may be as simple as needing the contact points cleaned--very similar to a lawn-mower engine's if you're handy. That's the easiest and simplest place to start. Capacitor replacement is pretty easy, but bearing replacement is a little more complicated. There may be other things going on, perhaps on the pump side.

[mas985]

My bet is on the capacitor. A humming but not turning motor is one of the key symptoms. Also, turn it on and then off can sometimes get it to spin.

[PoolDoc]

. . . membership updated.