Whirlpool Quiet Partner II Filter Cleaning

Quick Answer

To clean your Whirlpool Quiet Partner II filter, remove the bottom rack and rotate the cylindrical filter counter-clockwise to lift it out. Rinse the cylinder and the flat mesh screen under warm running water using a soft brush to remove all visible debris before reinstalling.

Most people don't even know their dishwasher has a filter. I've pulled filters out of machines that hadn't been touched in five-plus years, just absolutely caked in grey slime and bits of broken glass. Ignore it long enough and you're looking at a pump replacement. That's a $200+ repair that a ten-minute scrub would've completely prevented.

WhirlpoolDishwasherSeverity: low

Time to Fix

10–20 min

Difficulty

beginner

Parts Cost

$0 (no parts needed)

Tools Needed

Soft nylon brush or old toothbrush, Mild dish soap (Dawn works well)

Whirlpool Quiet Partner II Filter Cleaning

OK so here's the deal with the Quiet Partner II. It's got a manual filter that doesn't clean itself, and most owners have no idea. I've been to plenty of service calls where the customer thinks the dishwasher's broken and it's literally just a filter that's never been cleaned. Clean it monthly if you don't pre-rinse your dishes, every three months if you do.

Common Causes

Skipping the pre-rinse on heavily soiled dishes sends large food chunks straight to the filter, where they compact into a solid mat over several weeks of normal use.
Greasy pans and oily residue from salad dressings coat the fine mesh and eventually cut water flow to almost nothing.
Hard water mineral deposits forming a thick white crust on the filter mesh, basically turning it into a solid wall that water can barely pass through.
Running the machine on light or eco cycles doesn't flush the filter area with enough hot water to keep grease from sticking and building up over time.
Bits of food labels, toothpicks, or broken glass physically blocking the filter holes so water can't drain properly through the lower spray arm circuit.

Symptoms You May Notice

A fine grit or sandy residue coating your glasses and plates even after a full cycle, almost like the dishwasher made things dirtier.
An inch or two of grey, dingy water sitting in the bottom of the tub after the machine finishes its cycle.
That sour, mildewy smell hits you the second you open the door, especially if the machine sat closed overnight.
Dishes that look like they barely got wet because the spray arms are starved for water pressure.
You can actually see greyish slime or food chunks packed around the filter assembly at the bottom of the tub.

Tools Required for Diagnosis

Soft nylon brush or old toothbrushMild dish soap (Dawn works well)FlashlightWhite vinegarSmall bowl or container for soakingTowel or paper towels to lay under the rack

Diagnostic Checklist

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

Frequently Asked Questions

Can I run the dishwasher without the filter?

Don't do it. Running a cycle without the filter lets food debris go straight into the wash pump and drain pump. I've seen what happens and it's not cheap to fix. The impeller blades jam up or just wear down way faster than they should. You're looking at a potential pump replacement on a Quiet Partner II, which can run $150 to $250 in parts alone before labor. A ten-minute filter cleaning is a way better use of your time.

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

That's hard water scale, calcium and magnesium deposits left behind when water evaporates off the mesh. Regular soap won't touch it. Fill a bowl with plain white vinegar and drop the filter in for about 30 minutes. The acid dissolves the mineral crust and then it basically scrubs right off. If you're dealing with this every single month, your water's probably pretty hard and you should look into using a rinse aid consistently, or even a water softener if it's really bad.

How do I know if the filter is locked correctly?

Simple test. After you twist it clockwise and it feels solid, try pulling it straight up with your fingers. If it comes back up, it's not locked. If it stays put, you're good. Most Quiet Partner II models have arrows on the filter cap and on the tub floor that need to line up, or you'll feel a definite click at the end of the turn. Don't run the machine if you're not sure it's locked. An unlocked filter rattles around and lets debris through to the pump.

Should I use bleach to clean the filter area?

Honestly I'd skip it. One time probably won't hurt but bleach breaks down rubber gaskets and seals over time, and then you've got a leak on top of everything else. White vinegar handles mineral scale, Affresh tablets handle stains and odors, and regular dish soap handles grease. That combination covers pretty much everything you'll ever run into on one of these machines. Save the bleach for somewhere it's actually needed.

What if my dishwasher doesn't have a removable cylinder?

Some of the early Quiet Partner II production runs used a different filter style under the spray arm that's held in with a single Phillips screw. If you pull the bottom rack and don't see a twist-lock cylinder sticking up, look for a round plate with a screw in the center. But if yours is the older macerator-style with no visible manual filter at all, those almost never need attention unless the pump actually jams up with something hard like a piece of bone or broken glass.

How often should I actually be cleaning this filter?

Here's the short version: monthly if you load dishes dirty, every three months if you pre-rinse. And if you've never cleaned it since you got the machine, go do it right now, doesn't matter how long it's been. I pulled one last week that hadn't been touched in four years. It took three separate vinegar soaks and about 45 minutes of scrubbing to get it back to clear. Don't let it get to that point.

Models Known to Experience CLEANING Errors

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

DU1055XTSS3, DU1055XTVS3, DU1045XTPQ3, DU1048XTPQ3, DU1145XTPB3, DU1148XTPQ3, DU1055XTPQ3, GU2200XTSB2

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026