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Whirlpool Quiet Partner II DU960PWKS1 not draining

Harper57

Premium Member
Joined
Apr 7, 2021
Messages
2
Location
Orange County CA
Model Number
DU960PWKS1
Brand
Whirlpool
Age
More than 10 years
My model number is DU960PWKS1. I read the linked thread below carefully but I believe there are some differences in the parts for my model.


It does not appear to have a check valve flap for instance. It has three check balls instead if I’m reading the parts diagram correctly.

I had a technician come out and check the unit, two in fact. One of them looked at the dishwasher and indicated that the likely cause was an obstruction in the drain hose running from the unit to the disposal, which is quite long. There’s no obstruction in the air gap because I used a little trick I saw online were you blow through a cardboard paper towel tube and could feel the air coming through into the disposal. I will admit that there’s a slight kink in that hose as it bends around to come into disposal unit. As I recall I installed this disposal myself and I’m not an expert plumber by any means!

The second technician vacuumed out the drain line and said that there was no obstruction there so he advised that if there were further problems I probably need a new unit. He said that sometimes the pump motor, and this dishwasher is 13 years old, can still work but just not have the same power that it did before. I found that kind of dubious but he was the expert.

I just now pushed the drain button and the small amount of standing water at the bottom of the dishwasher did in fact drain out. So I’m wondering if the problem is the drain valve as described in the thread linked above.

I have not gone through any of the other steps in that thread such as dismantling around the pump but again some of the parts might be a little different. So any input or advice would be appreciated.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
117,784
Location
McMullen Valley, Arizona
Your model DOES have a check valve.:)

I'd check your check valve first for a clog.

Its easy to get to, just remove your lower access panel below your door, than unclamp your drain hose off from it, then get some pliers and unscrew it from the pump/motor assembly.

There should be just a black rubber flapper inside that check valve, push something through it, like a pen, it should go through. Also flush it with water from your sink.

Here's the check valve for your model:
Check Valve 675238


Here's the video that shows you how to remove and replace it:

If that's fine, then its possibly the drain impeller that might be cracked or broken.

Here's the impeller kit for your model(The smaller gray one is your drain impeller):
Impeller and Seal Kit 675806


Jake
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
117,784
Location
McMullen Valley, Arizona
Ok, sounds good.:)

Jake
 
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