Dishwasher drains only when water in the bottom has cooled.
My dishwasher is barely a year and a half old. Model number WDT720PADM2 that has worked great until recently. It runs the cycle perfectly and then there is water in the bottom at the end. If I go and manually press the “Drain” function it will make a noise like a murmur but not drain. If I wait a few hours until the water cools (the pump even), it will drain just fine.
I don’t want to rip the pump out before knowing, but is it possible that the pump gets overheated during a cycle and won’t properly work until it cools? I took the drain line loose thinking that was the original culprit and it clears well on it’s own (I blew in it and had no issues). I ran vinegar/baking soda through it a few times as well to help clear that even more.
I have the same issue with ours. Will only drain manually once the unit has cooled. Drains fine at that point. It’s not an issue with the plumbing being backed up. I’m thinking either the controller or drain motor itself. I’m wondering if it’s because we use the sanitize option and that is what is causing the drain motor to heat so much.
Mark Wynkoop さんによる
Anyone ever resolve this? We have the same issue with same model. I don’t believe that it’s the motor overheating as the draining only happens when the water is stone cold, e.g. left overnight. Leaving for, say, two hours does not fix it, even though the motor would be well cool after two hours.
BTW, I’m a professional engineer and pretty handy and there’s not much I can’t figure out and fix, but this one has me stumped!
No I am still running it as I have been. I have put off replacing anything just due to the fact that if I put a fan in front of the unit and remove the lower cover it does partially drain sometimes. I have no doubt the issue is something related to a thermal overload switch. The warmer the weather the longer it takes to allow it to drain. Last winter most of my loads would drain just fine.
As to your observation about the water being stone cold, yes I noticed the same. I think that whatever is being tripped must be close to the water and the water keeping it warm and open until it reaches whatever the threshold is.
I have the same issue with a Maytag. Must be a Whirpool brand issue. Works every time once cool. End of cycle the clean light is on but there is what appears to be the full amount of cycle water - cloudy water in the bottom of the dishwasher. I don't run the dry option.
What is the model number of the dishwasher?