Whirlpool Quiet Partner III Dishwasher Filter Guide

Quick Answer

The filter assembly is the primary defense against food debris recirculating during the wash cycle. If you notice a gritty residue on your glassware or water won't drain completely, the filter is likely clogged or the mesh has been punctured.

Here's the thing, I've shown up to more service calls than I can count where the drain pump was completely shot, and nine times out of ten the filter hadn't been cleaned in years. That pump replacement runs $150 to $200 in parts alone. A new filter is $20. Ignore this long enough and you're also looking at foul smells that soak into the plastic tub and never really go away, no matter how many cleaning cycles you run.

WhirlpoolDishwasherSeverity: moderateDifficulty: easy95% DIY Success

Time to Fix

10–25 min

Difficulty

easy

Parts Cost

$15 – $55

Tools Needed

Soft nylon brush, Dish soap

What Does the FILTER-ASSEMBLY Code Mean?

OK so the Quiet Partner III is a solid machine, but Whirlpool went with a manual-clean filter on this lineup instead of a self-cleaning grinder, which means the maintenance is on you. These filters usually hold up five to seven years, but in hard water areas I've seen them calcified solid in two. The fine mesh is the weak point. Once it tears, particles get into your drain pump, and that's when a $20 fix turns into a $200 repair call.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Food debris and organic buildup60%

Mineral scaling from hard water25%

Mesh tears or structural plastic failure15%

Symptoms You May Notice

Gritty 'sand' or food particles left on clean dishes
Cloudy glassware after a full cycle
Water remaining in the bottom of the tub after completion
Unpleasant odors coming from the dishwasher
A low humming or grinding noise during the drain cycle

Tools Required for Diagnosis

Soft nylon brushDish soapSlip-joint pliers with rag (for stuck spray arm nut)White vinegarSmall bowl or container for soakingFlashlight or work light

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Dishwasher Sump FilterWPW10192173 · $25–$55	WPW10192173	$25 – $55
Coarse Filter ScreenWP8531022 · $15–$35	WP8531022	$15 – $35

Frequently Asked Questions

How often should I clean my Whirlpool Quiet Partner III filter?

Honestly it depends on how you load the machine. If you're running it daily and not scraping plates, once a month is the right call. If you're pretty good about scraping and only run it a few times a week, every three to four months is usually fine. But don't just go by the calendar. If you start seeing spots on glasses or smelling something funky when you open the door, just go check it. Takes five minutes. I tell people to build it into their routine, like cleaning the lint trap or changing the fridge water filter.

Can I run the dishwasher without the filter installed?

No. Do not do this. I've seen what happens when people run it without the filter even for just a few cycles. Large food particles get pulled straight into the wash pump and drain pump. If a seed or a bone fragment gets into the impeller it can jam the whole thing or strip the plastic gears. The drain pump on these units runs around $60 to $80 for the part alone, plus labor if you're calling someone out. The filter exists to protect the pump. Running without it is like driving a car with no oil filter. Technically it works until it really, really doesn't.

Why is my filter covered in a white, chalky substance?

That's calcium and magnesium scale from hard water. Same stuff that builds up in your kettle or showerhead. On a dishwasher filter it acts like cement over time and blocks water flow through the mesh. Good news is it's usually fixable. Soak the filter in undiluted white vinegar for an hour, maybe two if it's really caked on. The acid breaks down the mineral deposits and you can brush the rest off with a nylon brush. If you're in a hard water area, adding rinse aid consistently and throwing in a water softener tablet once a month will slow the buildup down a lot.

Do I need to buy the expensive OEM filter or is a generic one okay?

Stick with the OEM Whirlpool part if you can. Aftermarket filters for this model are hit or miss, and the problem isn't really the mesh itself, it's the fit. The OEM filter seats perfectly against the sump housing with a tight seal all the way around. A lot of the cheap aftermarket versions have a slightly off diameter or a thinner gasket, and you end up with a small gap that lets fine particles bypass the filter entirely. That basically defeats the whole purpose of having one. OEM part W10872845 is what I always recommend. About $20 to $25 and it fits right every time.

My dishwasher still smells bad even after I cleaned the filter. What else should I check?

The filter is the most common culprit but it's not the only place gunk hides. Check the door gasket, that rubber seal around the entire door opening. Food debris and mold love to grow in the folds of that gasket and it's easy to overlook. Also pull out both spray arms and look into the holes because they pack with mineral deposits over time. The sump area itself can develop a slime layer too, just wipe it out with a damp cloth. Run a hot cycle with a cup of white vinegar placed in a bowl on the bottom rack. That usually knocks out whatever's left.

Models Known to Experience FILTER-ASSEMBLY Errors

This repair applies to most Whirlpool dishwashers with this error code. Common model numbers include:

DU1055XTSS, DU1100XTPQ, DU1145XTPB, DU1300XTVQ, DU1148XTPQ, DU1101XTPQ, DU1050XTPQ, DU1055XTVQ

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026