Dishwasher will not fill with water. I have an Equator dishwasher (Model SB72) that will not

Question

I have an Equator dishwasher (Model SB72) that will not fill
with water. I first noticed something was wrong when water started leaking out
the bottom of the unit. I removed the right side cover panel and found
that soon after a cycle began the water entered the air break unit, and then
the levelling unit. I am not dishwasher savy; I only know these terms
because I was able to locate the Service Parts catalog. Once the water
enters the leveling unit it begins to spill out from the top of the unit and
into the basin below, and eventually onto the floor. Any advice on what
might be the problem? The only thing I see that could be causing a
problem is a lot of deposit-like material in the clear plastic air break unit.