If your Roper dishwasher won't fill, start with the most common cause: a bad or clogged water inlet valve. When the water inlet valve fails, the dishwasher not filling with water is usually the result. Next, check the safety float in the front corner of the tub. If something is stuck underneath it, the float can signal an overfill condition and shut off incoming water even when the tub is empty. After that, confirm the main control board is sending power to the inlet valve, make sure the water supply shut-off valve under the sink is fully open, and test the float switch for continuity. A faulty control board can also keep a Roper dishwasher from filling, though it is a less likely cause than the valve or float-related issues. If your dishwasher won't fill or has no water, entering your model number on RepairClinic.com is the fastest way to find the exact Roper water inlet valve, float switch, main control board, or control board that fits your machine.
01 - Roper Dishwasher Water Inlet Valve
The water inlet valve opens to allow water to enter the dishwasher. If the water valve is clogged or defective, water will not flow into the dishwasher. Water inlet valves are not repairable—if the valve is defective, you must replace it.
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Some dishwashers have a safety float in the front corner of the tub to prevent the dishwasher from overfilling with water. If an object is stuck under the float, the dishwasher may not fill with water. If you find anything stuck under the float, remove it and the dishwasher should start filling properly.
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03 - Roper Dishwasher Main Control Board
A dishwasher's main control board provides power to nearly every electrical component in the dishwasher. A faulty board may be unable to supply power to the water inlet valve, preventing it from opening and allowing the necessary water to fill the tank.
You should confirm that the dishwasher's water supply shut-off valve is in the "On" or open position. The water supply shut-off valve is usually located under the sink and is connected to the hot water line.
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05 - Roper Dishwasher Float Switch
The float switch is a safety designed to shut off the water inlet valve if the dishwasher is overfilling. If the float switch is defective or stuck, it might stop the dishwasher from filling correctly. You can use a multi meter to test the float switch for continuity. If the float switch is defective, replace it.
A dishwasher's control board provides power to nearly every electrical component in the dishwasher. A faulty board may be unable to supply power to the water inlet valve, preventing it from opening and allowing the necessary water to fill the tank.