The first thing I would check is the connection of the air pressure tube (#2 on the
tub break down diagram) to the water level switch (#6 on the
cabinet break down diagram).
If there is nothing wrong then, most likely the water level switch is bad and has to be replaced.
- The part number for the water level switch
AP3750284
- Here are the break down diagrams for the Maytag washer
Model LSE7806ACE
Good luck.
Gene.