The Lower Door Seal is an OEM part for Whirlpool dishwashers. It creates a watertight seal along the bottom of the dishwasher door during operation, preventing leaks and ensuring water stays inside the dishwasher. This seal is critical for maintaining the efficiency and effectiveness of the dishwasher. Causes of a bad lower door seal can include regular wear and tear, accumulation of debris and food particles, or damage from improper cleaning or handling. A compromised seal can lead to leaks and reduced cleaning performance.