Whirlpool DU943PWKQ0 dishwasher Parts

On a Whirlpool dishwasher like model DU943PWKQ0, an F4 code commonly points to a drain problem (the dishwasher is not pumping water out as expected). Clearing the water and restoring normal draining usually clears the code.

What to check first (fast, no parts)

• Cancel the cycle and let the drain run; listen for the drain pump sound.
• Check the sink drain and garbage disposal inlet (a clog here can mimic a dishwasher drain failure).
• Inspect the drain hose for kinks, crushing, or a low loop that is missing.
• Look for standing water in the tub; remove debris around the sump area.
• Power reset: turn off the breaker for 1 minute, then restore power and try a drain or rinse cycle.

Parts that often fix an F4 drain issue

If the basics look good, these model-compatible parts are common fixes:

• Drain path restriction: replace a cracked or internally clogged hose such as the dishwasher drain hose WP3374077.
• Water level sensing issue: a stuck float can prevent proper draining behavior; inspect and, if needed, replace the dishwasher float assembly WP3376397.
• Wash system not moving water correctly: if you hear humming, grinding, or the unit will not circulate or drain reliably, the motor can be involved; consider the pump motor W10428168.

Quick symptom-to-likely-cause guide

What you notice	Most likely cause	What we do next
Water left in bottom after cycle	Clog or kinked hose	Check hose routing; clean sink/disposal path
Loud hum but little/no draining	Pump jam or failing motor	Clear debris; evaluate pump/motor
Intermittent drain, overfills, or odd stopping	Float stuck or misreading	Clean float area; check float movement

Why it matters

A true drain fault can leave dirty water in the tub, trigger repeated beeping, and stop the cycle mid-program. Fixing the drain path early also helps prevent odors and improves cleaning performance.

Helpful DIY references

• Use our Whirlpool dishwasher error codes guide to confirm what the flashes/beeps mean on your control style.
• If the control seems “stuck” after the error, follow how to reset a Whirlpool dishwasher.

Last updated: February 2026

The most common Whirlpool dishwasher problem is not draining (standing water in the tub). On Whirlpool DU943PWKQ0, this is usually caused by a clog or restriction in the drain path, or a drain component that is worn, loose, or leaking.

What to check first (fast, no-parts steps)

• Cancel the cycle and let the unit drain; listen for the drain motor sound.
• Remove any standing water and check the sump area for debris (glass, labels, food).
• Inspect the sink drain or garbage disposal connection for a blockage.
• Check the drain hose routing for kinks and make sure it has a proper high loop.
• Run a rinse cycle after cleaning to confirm water is moving strongly.

Parts that commonly cause drain and wash complaints

If the dishwasher still will not drain or it drains slowly, these model-matched parts are common fixes:

• Dishwasher drain hose WP3374077 (kinks, internal blockage, or a split hose)
• Clamp WP596669 (loose connection causing leaks or air intrusion)

If the dishwasher drains but dishes are still dirty, the issue is often water flow or spray action:

• Valve-inlt W10844024 (weak fill can reduce wash pressure)
• Dishwasher spray arm WP8268874 (clogged jets reduce cleaning)
• Dishwasher lower spray arm seal WP3376846 (leaks at the spray arm can reduce pressure)

Symptom-to-likely-cause guide

Symptom	Most likely cause	What we recommend
Water left in bottom	Drain restriction	Check hose routing; consider dishwasher drain hose WP3374077
Poor cleaning	Low spray pressure	Clean spray arm holes; inspect dishwasher spray arm WP8268874
Leaking at door	Worn door seal	Replace dishwasher door seal WPW10509257
Won’t start or stops	Control or latch issue	Verify door closes firmly; inspect dishwasher door latch WP3380854

Why it matters

Drain and water-flow problems can make a Whirlpool dishwasher seem “dead” or ineffective, but they are often caused by simple restrictions or a few high-wear parts (hose, inlet valve, spray arm, door seal). Fixing the root cause prevents repeat clogs, leaks, and poor cleaning.

For control-related issues, we use the same troubleshooting approach Whirlpool recommends for many models; see how to reset a Whirlpool dishwasher and, if your unit displays a fault pattern, Whirlpool dishwasher error codes.

Last updated: February 2026

Your Whirlpool dishwasher’s model number is printed on the rating label inside the door. Open the door and look along the inner edge of the tub opening (commonly on the left side); the label lists both the model number and serial number.

How to find the model number fast

• Open the dishwasher door fully and use a flashlight.
• Check the inner door frame and the tub lip around the opening.
• Look for a sticker or metal tag labeled Model and Serial.
• Write the model number exactly as shown (letters and numbers).
• If the label is worn, take a close-up photo and zoom in.

What the model number looks like

Most Whirlpool dishwasher model numbers are a mix of letters and numbers (for example, DU943PWKQ0). Once you have it, you can match it to the correct parts list for your exact unit.

Where you look	What you’re looking for	Why it helps
Inner door frame or tub opening	Model and serial label	Confirms the exact model for parts compatibility
Control panel area (less common)	Secondary label	Backup location if the main label is missing

Why it matters

Parts like a door seal, drain hose, or spray arm can look similar across Whirlpool dishwashers, but fit and mounting details vary by model. Using the exact model number helps us match the right replacement part the first time.

Next step once you find it

If your model is DU943PWKQ0, common fit-related parts you may shop by include the dishwasher door seal WPW10509257 and the dishwasher door latch WP3380854.

Last updated: February 2026