Kirk , the level on this is controlled by a float in the sump. As you look down into the sump , there is a small circular cover at about the 5 o’clock position. Pop this cover off to revel the float in its channel. You may find this float is all gunged up and isn’t rising as the water fills the tub. Hence you get an overfill condition and a constant fill/drain cycle.
Take out the float – making a note of its orientation , and give it a good clean. Also clean the float channel with some hot water so that the float travels freely up and down without stickng.
Hopefully this should clear your fault