Whirlpool DU1100XTPSA dishwasher Parts

Whirlpool “Quiet Partner III” is a series name used on multiple built-in dishwashers, not one single model number. For your Whirlpool dishwasher, the only reliable way to identify the exact Quiet Partner III model is to match the model number on the rating label to the information in the DU1100XTPSA owner's manual.

How to find the exact model number (fast)

• Open the dishwasher door and look around the tub frame (often on the left or right side).
• Check the edge of the inner door panel for a model and serial label.
• Write the model number exactly as shown (letters and numbers).
• Use the full model number to choose correct parts like a heating element, drain pump, or door seal.
• If the label is hard to read, take a clear photo and compare characters (0 vs O, 1 vs I).

Quiet Partner III name vs. model number

“Quiet Partner III” is marketing/series branding; the model number is what determines the correct parts list and service information.

What you have	What it tells you	What to use for parts
Quiet Partner III (series name)	General product family	Not enough by itself
Model number (example: DU1100XTPSA)	Exact configuration	Correct match
Serial number	Build date/plant info	Helpful for service

Why it matters

Using the exact model number prevents ordering the wrong Whirlpool dishwasher parts (for example, a control board, water inlet valve, or drain hose that looks similar but does not fit).

Related help

• If you’re trying to identify the unit because it will not run or needs a reset, follow how to reset a Whirlpool dishwasher.

Last updated: January 2026

On the Whirlpool DU1100XTPSA (Quiet Partner 3 series), the filter is in the bottom of the tub as part of the filter module area near the lower spray arm. Pull out the bottom rack and look at the base of the tub to locate the filter module.

How to find it (quick steps)

• Turn the dishwasher off and open the door.
• Slide the bottom rack out.
• Look at the bottom center area of the tub, around the base of the lower spray arm.
• Identify the filter module area (it sits in the sump area where wash water circulates).
• If you see standing water or debris, remove it before attempting any cleaning.

For diagrams and model-specific part locations, use the DU1100XTPSA owner's manual.

What you are looking for

Most Whirlpool dishwashers in this family use a filter module in the sump area rather than a tall, obvious “cartridge” filter.

Area in the tub	What you will see	Why it matters
Bottom center, under lower spray arm	Filter module / sump area	Traps soil and protects the wash system
Front right corner	Overfill protection float	If stuck, the dishwasher may not fill correctly

If you are troubleshooting poor cleaning or debris

A dirty filter area is only one possible cause. These checks usually make the biggest difference:

• Confirm the lower spray arm spins freely and is not blocked by large items.
• Scrape heavy food off dishes; avoid overloading so water can reach all surfaces.
• Use fresh detergent and the correct cycle for the soil level.
• Check the overfill protection float moves up and down freely.
• If drying is also poor, the heater circuit can be involved; the dishwasher heating element W10518394 is the model-matched heater part.

Why it matters

When the filter module area is clogged, water flow drops and soil can redeposit on dishes. Keeping the sump and filter area clear helps the circulation system, spray arms, and heating system work the way Whirlpool designed them to.

Last updated: January 2026

Poor cleaning (dishes still dirty) is the most common issue we see with Whirlpool dishwashers like model DU1100XTPSA; it is usually caused by restricted water flow (clogged spray arms or filter area), low water temperature, or a wash system problem that reduces spray pressure.

Quick checks that fix the most calls

• Confirm the door closes fully and latches; a loose latch can interrupt washing.
• Run hot water at the sink until it is hot, then start the cycle (helps the dishwasher heat faster).
• Make sure the cycle you chose matches the soil level (heavy soil needs a heavier cycle).
• Avoid overloading; blocked spray paths leave food on dishes.
• Use fresh detergent; replace it if it is clumpy or old.

Other common Whirlpool dishwasher problems (and what they usually point to)

Symptom	Most common cause	What to check first
Not draining	Drain path restriction or drain pump issue	Air gap or disposer knockout, drain hose routing, then pump
Leaking	Door seal or door alignment	Inspect the tub lip and gasket for gaps or tears
Won’t start	Door not latched, power issue, or control lockout	Latch, breaker/fuse, then reset procedure
Runs a long time	Water not hot enough or heating delay	Incoming hot water, heater operation

If your DU1100XTPSA shows a flashing Clean light, the manual points to a heater circuit problem; that often ties to the heating system and wiring, and it is a good time to check the DU1100XTPSA owner's manual.

Parts that commonly relate to these symptoms

When troubleshooting moves past cleaning and loading, these parts are frequent suspects on this model:

• Heating and drying issues: dishwasher heating element W10518394
• Not draining: dishwasher drain pump WPW10348269 and the drain hose routing
• Filling issues: dishwasher water inlet valve WPW10158389
• Leaks at the door: dishwasher door seal W10542314

Why it matters

Most “bad dishwasher” complaints are really wash performance problems; fixing water temperature, loading, and spray coverage prevents repeat clogs, reduces cycle time, and helps the heater and pump last longer.

Last updated: January 2026

To reset your Whirlpool dishwasher model DU1100XTPSA (Quiet Partner 1), we recommend clearing the current cycle with CANCEL/DRAIN, then restarting with START/RESUME. This resets the cycle logic and clears indicator lights so you can select a fresh cycle.

Reset steps (most effective)

• Press CANCEL/DRAIN once; the dishwasher runs a drain for up to about 2 minutes (if needed) and clears indicators.
• If you need to stop the drain immediately, press CANCEL/DRAIN again.
• Close the door firmly so it latches.
• Select your desired cycle and options.
• Press START/RESUME.

For the exact button locations and cycle behavior on your control panel, use the DU1100XTPSA owner's manual.

If it still will not restart

These are the most common reasons a “reset” does not seem to work:

• Door not fully latched; the cycle will not resume until the door is closed and START/RESUME is pressed.
• Controls locked; if Lock is on, buttons are disabled.
• Interrupted cycle; opening the door mid-cycle can make the Start/Resume light flash until you press START/RESUME.
• No hot water at start; running hot water at the nearest sink first helps normal operation.

Control lock quick check

If the controls are locked, unlock them first:

• Press and hold HEATED DRY for 4 seconds to toggle Lock off.

What each “reset” method does

Method	What it clears	When to use
CANCEL/DRAIN	Cycle and indicator lights	Stuck cycle, wrong selection, needs restart
START/RESUME after closing door	Resumes after an interruption	Door opened mid-cycle, power interruption
Control Lock toggle	Re-enables buttons	Buttons do not respond

Why it matters

A proper reset prevents starting a new wash with the wrong options, avoids leaving water in the tub, and gets the wash module and spray arms back into a normal sequence.

If you want a step-by-step sequence for Whirlpool control behavior, use our how to reset a Whirlpool dishwasher guide.

Last updated: January 2026