This morning I shut off the motor to change the valve to the backwash position. When I turned the motor back on, all I got was a humming noise. I've tried it with the valve in all positions.
The motor felt hot to the touch, by the way.
I let it cool down for about 90 minutes and tried it again, but I still get the humming noise and it's still 'frozen'.
What should I do next?