Question about Whirlpool GU2400XTP Built-in Dishwasher

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Dishawasher floods Water starts entering the unit and overflowing, flooding the kitchen, even when the dishwasher is not turned on.

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Two possible reasons come to my mind. First, and simplest, I've seen Dishwasher installations that did not use a air gap in the Dishwasher drain (usually a dome device mounted on the back of the kitchen sink or sometimes mounted in the wall just above the sink in older homes).When an air gap is not used, it is imperative that a high loop is formed in the dishwasher drain line, and tied up in that position (usually under the kitchen sink,as high as possible- the underside of the sink faucet usually works, or a screw into the bracing under the counter top to wrap a soft wire looped around the drain hose to hold it there permanently). If you do not use a air gap, or have a high loop in the dishwasher drain hose, then likely you are getting a back flow of dirty water into your dishwasher from the drain plumbing to which the dishwasher is connected (likely the garbage disposer or the tail from the sink basin.) So every time you either run the disposer (if you have one), or drain the sink basin, some of that contaminated, dirty water may be siphoning back into the dishwasher There are some exceptions, as some dishwashers including some whirlpool models, have a anti siphon ball device built into the drain pump housing.( You should also check your local plumbing code. They may require an air gap in your dishwasher drain line regardless of anything else.) Secondly,the water inlet valve may be sticking open, or not completely seating closed after the fill cycle. This could be indicated by a very gradual accumulation of clean, clear water in the bottom of the tub, to the point of completely filling the bottom of the tub to the point of overflow at the dam at the front bottom of the tub. The speed of overflow will be determined by how poorly the diaphragm inside the valve is seating. If you suspect this may be the problem, pull the rubber hose off the OUTLET end of the valve, with the machine in the OFF position or better yet UNPLUGGED (water and electricity do not mix, and can KILL you) ,and see that there is not a continuous flow or trickle of water. If there is any flow of water, in this scenario, then you have a bad inlet water valve, and the valve should be replaced rather than attempting to repair. Be sure to reconnect the rubber hose to the inlet valve before plugging the machine back in and attempting to run the machine, or you will have a high pressure flood, and likely electrical shorting under the machine which could likely ruin the machine.

Posted on Dec 30, 2011

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Hi KellyW,

 

The dishwasher drain hose may be clogged.  When the dishwashr starts up can you hear the water running into the Sink faucet drain. If not inspect the hose that attaches to the Sink Drain for restrictions.  Also in the bottom of the dishwasher you should have a filter.  If this filter is clogged you cannot expel water.  Clean the filter. 

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