Inground pool, StaRite 2 speed (2hp and 1/4hp). I like to switch the motor on once in awhile, just because. Couple of days ago I did this and pump hummed for 3-5 seconds and clicked off. Breaker did not trip.
So, I have been testing. It appears that when pump is on high, per the panel switch, that is when the humming starts. It appears that when the pump is on low.....it starts up as usual.
It has been cold here lately. 25 to 30 degrees at night. I also have a freeze control unit that overrides the timer. I read a lot of the threads on motor humming. Lots of good info and I will start by trying to turn the impeller (power off, breaker off). Read that it could also be centrifugal start switch is not working or the windings are shot. I might carefully test the capacitor.....except I thought I saw that only an analog meter will do the trick. I only have a digital multi-meter (but I thought I read they can test resistance, also) ?? I am an electrical and mechanical dunce.
My main question now, is: If the freeze control comes on at night and the motor fails to go on.....what is the worst that can happen? Will it hum for a long time and burn something up? Will it eventually trip the circuit breaker ?