If your Whirlpool washer is taking too long to wash, the water supply valves are the first thing to check. Make sure both the hot and cold valves are fully open, because a closed or partially open valve can keep the washer from filling or delay the start of the cycle. If the valves are open, a failed heating element may be causing the washing machine to take too long to reach the required water temperature. Disconnect power and use a multimeter to test the heating element for continuity. If it has no continuity, replace it. The next likely cause is a defective water inlet valve. Low water pressure or clogged screens in the valve's hose connection ports can make the washer fill slowly, creating a washer cycle that is too long. Check the household water pressure, clean the screens, and replace the water inlet valve if the problem continues. These checks can help answer, "Why does my washer take so long?" Enter your Whirlpool washer's model number to find the exact heating element or water inlet valve replacement part for your specific machine.
01 - Water supply valve turned off
Confirm that both the hot and cold water supply valves are fully open. If the valves are closed or partially open the washer won't fill or will take longer to start the wash cycle.
Highly Likely
02 - Whirlpool Washing Machine Heating Element
Many washers use a heating element to raise the temperature of the water entering the tub. A defective element may cause the washer to take too long to clean its load. You can use a multimeter to test the heating element for electrical continuity. If the element tests negative for continuity, you'll know the heating element is faulty and will need to be replaced.
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The water inlet valve opens to allow water to enter the washing machine. If the water inlet valve is defective, the wash may fill slowly or not fill at all. The water inlet valve requires sufficient water pressure to function properly. First, check the water pressure to determine that it is adequate. If the water pressure is adequate, try cleaning the screens inside the water inlet valve hose connection ports. If the washer still fills slowly, replace the water inlet valve.