Whirlpool GU2455XTSB0 undercounter dishwasher Parts

In a Whirlpool GU2455XTSB0 undercounter dishwasher, the most commonly replaced parts are the ones that handle heating, draining, filling, sealing, and rack movement. These parts wear from normal use, hard water buildup, clogs, and repeated door cycles, so they are the first places we check when performance drops.

Most common replacement parts (and what they fix)

• Heating and drying problems: dishwasher heating element W10518394
• Won’t drain, drains slowly, or leaves water: dishwasher drain pump WPW10348269
• Won’t fill or fills too slowly: dishwasher water inlet valve WPW10158389
• Leaks at the door or steam escaping: dishwasher door seal W10542314
• Upper rack falls off the track: dishwasher dishrack slide rail stop, upper WP8565925
• Dead dishwasher or intermittent power: fuse W10258275

Quick symptom-to-part guide

Symptom	Most likely area	Example part for GU2455XTSB0
Dishes not dry, water not hot	Heating circuit	W10518394 heating element
Standing water in tub	Drain system	WPW10348269 drain pump
No water entering	Fill system	WPW10158389 inlet valve
Water on floor near door	Door sealing	W10542314 door seal
Upper rack won’t stay on rails	Rack hardware	WP8565925 rail stop

What we recommend checking first (before buying parts)

• Clean the filter area and remove debris from the sump.
• Inspect spray arms for clogs and cracks.
• Confirm the drain hose has a high loop and is not kinked.
• Look for mineral scale on the heating element.
• Check the door seal for tears, flattening, or gaps.
• If the unit is completely dead, test the fuse for continuity.

Why it matters

Replacing the correct part restores wash performance, prevents leaks, and avoids repeat failures. For example, a slow drain can be a clog, but a noisy drain with poor flow often points to a failing pump.

Last updated: February 2026

On the Whirlpool GU2455XTSB0 dishwasher, leaking at the bottom of the door is usually caused by a worn door seal, a door that is not closing squarely, or wash water being deflected forward by a clogged filter area or mis-aimed spray. Start by inspecting the seal and the tub lip for damage and debris.

Quick checks we recommend first

• Make sure the dishwasher is level and not leaning forward.
• Look for food soil, detergent buildup, or a utensil blocking the door from closing fully.
• Inspect the inner door edge and tub lip for nicks, cracks, or hardened residue.
• Check that racks are fully seated and not pushing the door inward.
• Run a short cycle and watch where the first drip appears (center, corners, or both).

Most common causes and what to do

What you notice	Likely cause	What we do next
Drips from the bottom corners	Door seal not sealing evenly	Clean the sealing surfaces; replace the seal if torn or flattened
Water seems to “sheet” out during wash	Spray deflection from heavy suds or obstruction	Use dishwasher detergent only; reduce rinse aid setting; clear obstructions
Leak starts later in the cycle	Overfill, drain restriction, or backflow	Check drain path and air gap/high loop; confirm proper draining

Door seal issues

If the gasket is split, stiff, or permanently flattened, it will let water escape under wash pressure. Replacing the dishwasher door seal W10542314 is the most direct fix when cleaning and alignment do not stop the leak.

Suds and spray deflection (very common)

Even a small amount of hand soap residue on dishes can create excess suds that push water toward the door. Also, tall items can redirect the spray into the door seam.

• Use only automatic dishwasher detergent
• Skip pre-rinsing with dish soap
• Keep large pans from blocking the lower spray path
• Verify the upper rack is not overloaded and drooping

Why it matters

A door-area leak can damage flooring and can also drip into the toe-kick area where electrical components and insulation sit. Fixing the seal, alignment, and wash conditions early prevents repeat leaks and bigger repairs.

Last updated: February 2026

In a Whirlpool GU2455XTSB0 dishwasher, the most common “thing” you see at the bottom of the tub is the heating element; it sits low in the wash area and helps heat the water and improve drying performance. A filter/sump area is also located at the bottom.

What it usually is (and what it does)

Most undercounter dishwashers have several components you can notice near the tub floor:

• Heating element: a metal loop/rod that warms water and boosts drying (common to see exposed)
• Sump and filter area: where water collects before being pumped through the spray arms
• Float/overfill protection parts: a small dome or cylinder that helps prevent overfilling
• Drain intake area: where water exits during drain portions of the cycle

If the part you’re seeing is a metal loop running along the bottom, it matches the dishwasher heating element W10518394.

Quick ID guide by appearance

What you see at the bottom	Most likely part	What you’ll notice
Metal loop/rod (often U-shaped)	Heating element	Helps with hot wash and drying; may look slightly discolored over time
Round screen, grate, or cover	Filter/sump area	Catches debris; can cause poor cleaning if clogged
Small plastic dome/cylinder	Float	If stuck up, dishwasher may not fill

Why it matters

Correctly identifying the bottom component helps you troubleshoot symptoms like poor drying, cloudy dishes, standing water, or a dishwasher that will not fill. For example, a failed heater can reduce drying and cleaning, while a blocked sump/filter can reduce spray pressure.

When to inspect or replace a part

Check the bottom area if you notice any of these:

• Dishes come out cool and wet after heated dry
• White film or greasy residue remains after cycles
• Burning smell or visible damage on the metal element
• Standing water that drains slowly
• Breaker trips during the wash or dry portion

If you’re doing electrical testing during diagnosis, we recommend using a meter and following safe practices from how to use a multimeter to test electrical parts video.

Last updated: February 2026

Whirlpool Corporation sells dishwashers under several major brands, including Whirlpool, KitchenAid, Maytag, JennAir, and Amana. For your Whirlpool GU2455XTSB0 dishwasher, the brand is Whirlpool, but many service approaches and parts concepts are shared across these Whirlpool-family platforms.

Whirlpool dishwasher brand family (common in the US)

These are the most common dishwasher brands you will see associated with Whirlpool Corporation:

• Whirlpool: mainstream, wide availability of parts and service
• KitchenAid: premium features and styling
• Maytag: durability-focused positioning
• JennAir: luxury line with higher-end design
• Amana: value-oriented lineup

Why this matters when you are shopping parts

Brand family matters because many dishwashers share similar designs (wash system, heating circuit, drain path), but parts still must match the exact model number to fit and function correctly.

• Always confirm the full model number (GU2455XTSB0) before ordering
• Match by part ID, not just by description
• If symptoms point to a system (heating, draining, leaking), start with the most common failure parts for that system

Common part examples for GU2455XTSB0 (by symptom)

Symptom	What to check first	Example part for this model
Dishes not drying, water not heating	Heating circuit	Dishwasher heating element W10518394
Dishwasher will not drain	Drain path and pump	Dishwasher drain pump WPW10348269
Water leaking at the door	Door sealing surfaces	Dishwasher door seal W10542314
Dead, no lights, intermittent power	Power protection	Fuse W10258275

Helpful DIY skill that applies across brands

If you are troubleshooting electrical parts (like a fuse, control, or heater circuit), using a meter is the safest way to confirm an open circuit before replacing parts. Our guide how to use a multimeter to test electrical parts video walks through the basics.

Last updated: February 2026