If it is a model that uses contactors, it is most likely a sticking control valve switch. Once you actuate the lever that is making the pump motor stay on you will see that the lever is attached to the control valve. There is a switch either near the top or the bottom of the control valve plunger. The switch is either out of adjustment or needs replacing.
The pump contacts could also be sticking. That would be caused by burned tips or by running the truck on a dead battery.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.