I have a whirlpool dishwasher, it worked a couple of weeks ago. I don't know where to find the valve on the back of the dishwasher. I don't have a drain gap, or garbage disposal. The cycle washes, and does fine, but my water won't drain where it needs to be. I press the cancel/drain button and for a little while it worked and heard a girgle through the sink, but the last two times I have had to take water out of the dishwasher. Plus, I don't know how to get the top off with the screws in it. Anyone else have the same dishwasher, and has had problems with the draining. Much appreciated for suggestions.

Thank you,

Kelliwings