If the spray arm works sometimes then it’s not broken. The motor assures just the right spin for thorough and effective cleaning. Pull out and food or dishes that might be blocking the arms. Shut off power to the dishwasher and check the wiring connections on the lower spray arm motor. Before you begin, switch off the power to the dishwasher. A.Track stop B.Track Thanks and hope this information helps someone else. Dynamic Lower Spray Arm (on some models) The Dynamic Lower Spray Arm is motor driven and does not spin freely unless the dishwasher is running. This is a replacement spray arm for your dishwasher. Repair your KitchenAid Dishwasher Wash Arm & Wash Arm Support for less. If your dishwasher has a spray tower or spray cap attached to the top of the arm, you must twist it off or unsnap it to access the nut. It is approximately 20 inches wide. The spray arm can occasionally become clogged and damaged, and this can prevent your dishes from being cleaned properly. The control board controls it depending on what cycle you’ve selected. Step 1 Open the dishwasher door and inspect the arms for blockages. Check for obstructions blocking the lower spray arm from turning. The diverter is what moves that blue disk. This spray arm is made of gray plastic and is sold individually. This should be an easy movement with no hindrance. Kitchen Aid Lower Spray Arm Reinstalled by: Anonymous I finally had to call a service person to reinstall the lower spray arm. Step 2 Unscrew the cap of the spray arm by turning the cap clockwise. This is an authentic OEM part. A dishwasher not spraying water can be caused by multiple factors. He held the hub turn knob up with a plyers while pressing down on the spray arm and then slowly turning it. I ran the dishwasher while it was open, and when it shifts from the lower spinner to the upper two, no water comes out of the lower (so I do know that it is making the switch correctly), and water is flying out of the upper one. AccApp, this one is kind of unique, as the diverter motor not only turns the diverter disk to change water flow between upper and lower arms, It also powers the lower spray arm rotation. He got it back on and I will never remove it again. Find KitchenAid Dishwasher Wash Arm & Wash Arm Support Replacement Parts at RepairClinic.com. It diverts water to different spray arms. Remove the spray arm if it is faulty or you have not identified a problem. Fast, same day shipping. Step 2: Remove the Spray Arm. The water flow to the lower rotating spray arms has diminished greatly, and the flow to the upper rotating spray arm has apparently stopped (arms don … read more If the wiring is intact, replace the lower spray arm … If the lower spray arm turns when the top one doesn’t I’m inclined to believe it’s supposed to do that. The spray arm can occasionally become clogged and damaged, and this can prevent your dishes from being cleaned properly. The spray arm rotates and sprays water to clean your dishes. We own a KitchenAid dishwasher, model KUDI01FLWH1. The spray arm rotates and sprays water to clean your dishes. 365 day right part guaranteed return policy. It may be a blockage in the spray jets, overloaded with dishes, a blocked pump, float switch malfunction, water valve issue, or a water pressure problem. To replace the spray arm, turn clockwise to release, and attach the new arm by connecting it to the nozzle and turning counter clockwise. Spinning arm issues can be fixed, but it also might indicate a problem with the unit's timer motor. It is dribbling out of the middle, but not nearly enough to spin it. Lift the arm up and out. Remove the top dish rack to perform the same procedure to test the functionality of the upper spray arm (if there is one). 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