W10509257 Dishwasher Door Gasket - For Whirlpool Kenmore Dishwashers

W10509257 / WPW10509257 Dishwasher Door Gasket Seal

Key Features

• High-Compression EPDM Rubber: Manufactured from premium, heat-resistant EPDM rubber designed to maintain a watertight seal through thousands of high-temperature "Sanitize" and "Heated Dry" cycles.
• Precision-Molded T-Stem: Features a standardized T-shaped base that press-fits securely into the dishwasher's tub channel, providing a friction-lock installation without the need for messy adhesives.
• Enhanced Steam Barrier: Specifically engineered to block both pressurized water and escaping steam, protecting your kitchen's wooden cabinets and laminate countertops from moisture damage and warping.
• Detergent-Resistant Construction: The non-porous rubber material resists degradation from the caustic enzymes found in modern dishwasher pods, preventing the seal from becoming brittle or gummy over time.
• Acoustic Dampening: Helps reduce operational noise by creating a tight, vibration-resistant seal between the inner door panel and the dishwasher tub frame.

Replaces / Cross-Reference Part Numbers

• WPW10509257
• AP6022476
• PS11755809
• W10082795
• 3368994
• 3376927
• 2448669
• WPW10509257VP
• EAP11755809
• PS5573867

Compatibility & Fitment

This door gasket is the standard perimeter seal for most Whirlpool-manufactured 24-inch wide Plastic Tub dishwashers. Key compatible brands include:

• Whirlpool: Fits hundreds of DU, DP, and GU series models (e.g., DU810SWPQ, GU2400XTPB).
• Kenmore (665 Series): Compatible with many 665-prefix dishwashers produced for Sears (e.g., 665.1573291, 665.16362).
• Maytag & Amana: Direct fit for MDB, ADB, and PDB series models utilizing the W10509257 seal style.
• KitchenAid & Estate: Fits various KUD and DU series units with traditional plastic interiors.
• Note: Specifically for Plastic Tub dishwashers. If you have a stainless steel tub model, your gasket will likely be a W10806142 or similar variant.

When to Replace

• Water Leaking from Bottom or Sides: Puddles forming on the floor during the wash cycle, often indicating the gasket has flattened or pulled out of its channel.
• Visible Steam Escaping: Condensation forming on the underside of your countertop or front control panel during the drying cycle.
• Visible Gasket Damage: The rubber looks cracked, brittle, or has visible chunks missing from the perimeter.
• Door "Feeling" Loose: The door latches too easily without the usual resistance, signifying the gasket has lost its compression.
• Black Mold/Mildew Build-up: Persistent odors or visible black slime inside the gasket folds that cannot be cleaned away with vinegar or bleach.

Installation Tips

• The "Warm Soak" Trick: Before installing, soak the new W10509257 gasket in a sink of warm water for 10 minutes. This softens the rubber and helps remove any kinks from shipping.
• Clean the Channel: After pulling out the old gasket, use a small brush and soapy water to thoroughly clean the tub channel. Any old soap or grit left behind will prevent the new seal from seating correctly.
• Find the Center: Fold the new gasket in half to find the midpoint. Start by pressing the midpoint into the top-center of the dishwasher tub channel and work your way down the sides evenly.
• Do Not Stretch: Press the gasket into the channel firmly, but avoid pulling or stretching it. If you have "extra" gasket at the bottom, remove it and start over from the center to ensure an even fit.
• The "24-Hour" Set: After installation, close the dishwasher door and leave it latched for at least 24 hours without running a cycle. This allows the new rubber to "take a set" and conform perfectly to the door's shape.