If your Roper dishwasher is not cleaning, or your dishwasher is not cleaning dishes and leaving dishes dirty after the cycle, start with the most likely cause: a restricted or failing water inlet valve. If the valve cannot let in enough water, the dishwasher will not wash properly. Next, check for improper loading, since tightly packed dishes can block spray patterns and leave dishes still dirty after the dishwasher cycle. Water temperature matters too, and a supply below 120°F can keep detergent from working the way it should. After that, inspect the center wash arm support, center wash arm assembly, and lower wash arm assembly. A damaged support, a wash arm that is not lined up with the water supply nozzle, or clogged spray arm holes can all reduce water flow and cleaning power, especially on one rack. Remove any debris you find, and replace parts that are cracked or badly blocked. For the exact Roper water inlet valve, wash arm, or center wash arm support that fits your machine, enter your model number on RepairClinic.com.
01 - Roper Dishwasher Water Inlet Valve
The water inlet valve opens to allow water to enter the dishwasher. If the valve is clogged or defective, the dishwasher won’t get enough water to clean dishes properly. If the water inlet valve is clogged, replace it. Do not attempt to clean the water inlet valve—cleaning the valve could make it more likely to fail.
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Improper loading will keep the water from cleaning the dishes. Make sure you are leaving enough space between the dishes.
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03 - Improper water supply temperature
The water may not be hot enough. The recommended water supply temperature for a dishwasher to clean properly is 120 degrees Fahrenheit (49 degrees Celsius). If your hot water temperature is lower for safety reasons, try using a longer cycle that heats the water.
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04 - Roper Dishwasher Center Wash Arm Support
The center wash arm is attached to a support that is normally attached to the underside of the upper dishrack. Water flows through the support to the arm which circulates the water to the dishes in the upper rack. If the support is damaged or obstructed water may not flow properly. Inspect the support for any damage or obstruction and replace if necessary. In addition, make sure that the support is mating properly with the water supply nozzle.
The center wash arm circulates water to the dishes in the upper rack. If water can’t flow properly through the center wash arm, the dishes in the upper rack won’t be cleaned properly. Over time, food particles can get trapped in the tiny holes in the wash arm. If your dishes are coming out dirty, the wash arm might be clogged. To unclog the center wash arm, remove the wash arm and dislodge any debris from the holes. If the wash arm is extremely clogged, replace it. In addition, make sure that the center wash arm assembly is mating properly with the water supply nozzle.
The lower wash arm circulates water to the dishes in the lower rack. If water can’t flow properly through the lower wash arm, the dishes in the lower rack won’t be cleaned properly. Over time, food particles can get trapped in the tiny holes in the wash arm. If your dishes are coming out dirty, the wash arm might be clogged. To unclog the lower wash arm, remove the wash arm and dislodge any debris from the holes. If the wash arm is extremely clogged, replace it.