Lawrence for Model Number fdb510lcs0 My top arm does not seem to move at all. Thank you for your suggestion to check water fill level, filters and impeller. I have checked all this and it seems fine, but water still not coming out of top. It is not a clog in the line. If I manually try to time it, on and off using the door handle, I can sometimes get the water to come out the top. It sounds different. Questions: 1. Could the check ball look fine and still be a problem? Old or defective? waterlogged? Do they need to be replaced every x years or something? Mine is probably the original, over ten years old. 2. Could the switching off and on of the water, which allows the check ball to move to spray the top, be timed wrong and cause it to keep spraying only down? Is there some way to check for this? Thank you very much. Your previous answer: Answer Lawrence, You will want to check the water fill to make sure that the water is filling to the proper level. If the water level is not correct then it will cause the unit build enough pressure to pump water to the upper spray arms. Also check the filters to make sure that they are not dirty and make sure the the impeller is not damaged.
Answer Lawrence, The check ball could be the issue with the unit. There is nothing that is timing the check ball to move and it would not be a bad idea to go ahead and replace the check ball. Read More... Answered by AppliancePartsPros.com | Friday, April 15, 2016