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FOUL SMELL COMING FROM SINK & DISHWASHER - Tappan MDB531RF Dishwasher

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Posted on Jan 02, 2017

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SOURCE: foul odor coming from kitchen sink/dishwasher area????

Please confirm that your dishwasher is a Tappan MDB531RF and also provide its approximate age. Thanks.
Recommend that you confirm that the drain tube, clear back to the attachment to the dishwasher is clear. Inspect the outlet for debris inside (and odor too.) Does the drain hose connect to a tube that is part of the undersink drain trap? Since you don't have an airgap, make certain that the drain hose goes as high as possible under the counter, possibly making a loop at the top.
If problem remains, even though no odor is inside, recommend you remove the filter in the sump area beneath the lower drain rack. Clear any debris, especially anything that could block/slow the drain process. Depending on the age of the dishwasher, a failing pump motor could be causing solids from making it to the drain. Replacement of pump/motor would be the next step.
If problems continue, I recommend that the kitchen drain be snaked clear to the main. I look forward to hearing back what you have found/not found.

Posted on Mar 30, 2009

  • 1 Answer

SOURCE: foul odor coming from kitchen sink/dishwasher area????

Hi Jenny - I had a terrible smell coming from under my sink, and I too thought it was a dishwasher/garbage disposal drainage issue. I used vinegar, baking soda, bleach and hot water on a daily basis. When I cut out the wallboard from under the sink and the smell got even worse, however, there was no sign of any water leaks or evidence of a dead animals. Come to find out, when I had a "friend" cut out a pass through from my kitchen (above the sink) into the den, he cut the pvc exhaust pipe and didn't re-route it nor cap allowing the fumes to escape outside via the attic. Thus, the fumes had no place to go other than down. The smell confused me because I thought it was rotten food or most likely a dead mouse trapped between the wall. The smell was actually causing me to get headaches. It's been almost 24 hours that this was repaired and I already can "smell" the difference. I hope this helps! Good luck.

Posted on Jan 16, 2010

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3 Answers

Foul odor coming from kitchen sink/dishwasher area????


Hi Jenny - I had a terrible smell coming from under my sink, and I too thought it was a dishwasher/garbage disposal drainage issue. I used vinegar, baking soda, bleach and hot water on a daily basis. When I cut out the wallboard from under the sink and the smell got even worse, however, there was no sign of any water leaks or evidence of a dead animals. Come to find out, when I had a "friend" cut out a pass through from my kitchen (above the sink) into the den, he cut the pvc exhaust pipe and didn't re-route it nor cap allowing the fumes to escape outside via the attic. Thus, the fumes had no place to go other than down. The smell confused me because I thought it was rotten food or most likely a dead mouse trapped between the wall. The smell was actually causing me to get headaches. It's been almost 24 hours that this was repaired and I already can "smell" the difference. I hope this helps! Good luck.

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