What can cause these dishwashers to overflow? I know of two reasons. Are there more?
This dishwasher certainly could never be called a pot scrubber, but it ran satisfactorily for two years. Then it began over flowing.
The cause the first time was the filler shut off. The filler shut off mechanism is a pressure switch at the end of a long tube. When the water rises to a sufficient level it is driven into the tube raising the pressure and closing a switch and causing a relay to shut the fill valve. the tube had been clogged with built up debris and cleaning out the tube caused it to resume working.
The second time the clean out fix did not work. The problem this time seemed to be the door. There is no door seal at all on the dishwasher. Instead, flanges on the sides of the door opening fit loosely into deep recesses on the door sides and a flange on the door bottom fits in a recess at the bottom front of the door opening. Water splashes on the door, runs down and collects in the recess at the bottom, flows through that channel to the sides where it runs back into the sump.
The channel at the bottom had become clogged and the water could not drain easily back into the sump.
It built up until it overflowed. Cleaning it out seemed to fix the problem.
It worked for several loads before it overflowed again. This time it does not seem to be either of the first two problems.
Is there any other possible cause of an overflow?
Thanks.
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I had recently blown out the tube leading to the pressure switch, but when I did not get any response to this question, I decided to try really cleaning the tube well. I disassembled it completely and cleaned the lower part with a doubled coat hanger wire. The dishwasher is working now. I'm keeping my fingers crossed.
I still wonder if there is any other possible cause of water overflowing.
BTW Sorry about fouling up the spelling of Free-standing. They need an editing option for those of us who do not always proofread..
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