I've got a GE dishwasher model number GSD1350X70 that's having
I noticed that during the drain cycle, the water pouring out into the
disposal was at a very low pressure and the dishwasher would begin
filling up before it had completly drained. So, I thought fine,
something wrong with the drain mechanism. Took it apart and noticed
that the flapper in the check valve assembly was all mangled. Got a
new check valve assembly and now it's draining like a champ.
However, I still have the same problem!
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.
I thought that maybe the fill valve solenoid was bad, but putting an
ohm meter to it shows some resistance (maybe a little less than 1K, I
forget) and it does seem to turn the water flow on and off.
I then went through the exercise of measuring the water level in the
tub at the end of each fill cycle. It varied from about 2 cm on the
low side to 6+cm on the high side! Seems like quite a range to me.
And, when it has 6 cm of water in the tub, it can't drain it fast
enough before the fill cycle begins again.
My next guess at what the problem could be is that the timer is bad but
I would like to get some input before I invest $50 to $100 on a new one
Any wisdom is appreciated.
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?
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
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.
I would guess the float valve is not always sealing completely. Usually
dishwashers turn on the water for a fixed amount of time. The float stops
the fill. Then nothing happens for awhile until the fill cycle times out
then the wash cycle begins. Same for drain cycle, pump turns on for longer
than necessary to drain. I believe there is only one pump. A solenoid is
used to send outlet of pump to either the drain hose or the spray jets. If
it were not working fully this might also cause your problem. Even if water
came back in it would only be amount in the hose doesn't seem like this
would be as much as you are seeing.
A side note, I was home when my dish washer (Maytag) was installed and kept
the installation instructions. They tell you how special button codes to
enter to test the various functions of the washer, never had to use but nice
to have, see if something like this can be downloaded for yours.
My understanding is that the fresh water is on for only a set amount of
time as you say. But everything I've read suggests that the float is
only there to stop the thing from flooding. In a properly operating
dishwasher, the float should never kick in to stop the thing from
filling. However, I am perfectly willing to be corrected in this if
this is incorrect.
Hmmmm...If I understand you correctly, you're suggesting that it's
possibly spraying at the same time it's draining when it should only be
draining. This sounds like a plausible theory but I fairly certain I
don't hear the water being sprayed around while it's draining. I'll
have to check this tonight after work. And I know that I hear the
solenoid click when the drain cycle starts but maybe it's not got a
Interesting. I'll have to see about that.
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