It seals the space between the washer tub and the surrounding door frame to prevent leaks. During wash cycles, water, heat, and detergent can degrade this rubber gasket material over time.

Causes of a bad tub gasket include cracks, compression, or perforations from years of expansion and contraction during wash cycles. Food debris or minerals caught in the channel may also inhibit proper sealing.

Symptoms of a defective tub gasket are:

• Puddles or standing water inside or outside the dishwasher
• Water leaks visible around the tub and door framework
• Wet floors after extended use

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