GE WASHER, Water was all over the floor, I'm pretty sure that it was a water level sensor/switch ?

Did you look at the air dome on left side of tub?
Many times I have found crud in the air hose that goes to pressure switch.
I use a small screw driver to remove as much as possible and then a pipe cleaner or to clean out the set. Normally if you have a perforated tub, the high setting will be approximately the height of the last line of holes.
Earlier machines had larger differences than the newer machines between low, med, and high. Later machines don’t have as large of differences. This is due to more aggressive agitators.
Of course, the latest machines have load sensing capabilities so the machine may not rely on the pressure switch/sensor.
Best thing to do is check the Use and Care guide, it will give some clues.