Trying to learn to adjust chemicals

[onemsmom]

I'm getting a faint hum or sometimes nothing at all. Does that tell you anything?

[Poconos]

The faint, or low level hum is a common problem. Totally quiet and dead is something else and won't get into that now. I don't know how gutsy you are to dive into this problem but here it goes. What I describe is applicable to most pump motors but not all. In simple terms there are two windings in these motors. One is powered as long as the pump power is on and the other is used to get it started and disconnects when the rotor comes up to speed. This starter winding is in series with a capacitor and a centrifugal switch. When the rotor is stopped the switch is closed to power this circuit. Two things can go wrong. The capacitor can short or open and in either case the motor won't start. Soluion is to replace the capacitor for $10 or less. The second problem, which is more common and indicative of your problem, is the switch contacts get dirty over time and won't make contact. When power is applied the starter circuit is open and all you get is a low level hum. The solution is to clean the contacts. Something to try is to apply power and shock the motor by smacking it with the flat side of a 2x4 or some flat piece of wood but don't dent the motor housing. If it starts, great. If not, smack it a few more times. Many times the jolt will cause the contacts to close and start the motor. This isn't a permanent fix but WILL identify the problem. the permanent fix is to clean the contacts. Before going any further be sure the power if off and cannot come on unexpectedly. The switch contacts are usually located at the back end of the motor where the wires enter. Remove that cover and you'll see the contacts and the centrifugal switch mechanism. The contacts can be dressed ideally with a fine flat metal file but is you can't get in there you can use 600 grit sandpaper (auto store, Home Depot, etc). The contacts are usually silver and soft so you don't have to grind away. Fold a strip of sandpaper to make it double sided and run it between the contacts a few times. That should fix the problem.
I have no idea how many motors have been fixed like this over the years saving people many $$$. Hope yours is as simple. If you decide to pursue this and have more questions please don't hesitate to ask. At this point you have nothing to lose.
Al

(ajs-1)