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Edwin Pawlowski wrote:
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So it appears I have more than one problem. Only now, on some of the
cycles it will drain before filling up again and on others it won't.
It'll keep on draining while letting fresh water in at the same time.

That may be normal, as part of a rinse to get all the soapy water out. I
know my old DW did that.

Perhaps I wasn't clear in my original post.

The DW will fill with fresh water and then go through a cleaning cycle.
It will then attempt begin to drain all the dirty water. However,
because there is too much water in the tub, it begins to fill up again
for the next rinse cycle while it's still draining from the previous
cycle. So what happens is the new water is coming in while the old and
new water is being pumped out. As a result, all the new water gets
flushed out of the thing and then it will sit through a cycle with no
water in it.

Am I correct in thinking that the valve to open the fresh water line is
controlled by the timer? That is, the timer tells the valve to open
and then a short while later it tells it to close?

And a second question, how does the dishwasher know when to stop
draining? In other words, how does it know the tub is empty?

Thanks.
Dan

We had a similar problem with a GE and found it had TWO flapper valves.

TB

I'm fairly certain that's not the case with mine.

Thanks.
Dan

RE, how does it get the right fill, there was a discussion about that
in here few months ago. Dishwashers have float switches. On my GE,
it's near the front and covered by a plastic dome. Now, the
interesting part is this. I assumed they used the float to measure
when to cut off the water. Someone here that was from an appliance
parts place and seemed to know what he was talking about, said that is
not how it's done. He said they just time the flow, as you described
and the float is used to guard against overflow. Not 100% sure I buy
that, as it would seem very easy and accurate to use a float. Like,
with timing, how do they account for different pressure and consequent
flow rates?

Also, in your list of symptoms, something doesn't sound right. You
said that it starts to fill again while it's still draining out. Are
you sure it does that, as opposed to there just being water left? I
would think that the controller would have to turn off the pumpout
before starting to refill, even if it were not empty.

The big question in all this is how old it is. If it's 10+ years old,
it may not be worth putting any real money into it.