Tracy for Model Number Fdb4315lfco Top sprayer is not getting water to it. I've cleaned it out, replaced the rubber ring at the top. Water is not going to the top of the tube to reach the sprayer. Water pressure tested at 48 psi. Could the sensor be the problem. Part number 154473901
Answer Tracy, The sensor [AP3580342} shouldn't be the issue, it determines the water clarity and extends or reduces the wash run time automatically. You have good water pressure but you may have a clogged fill valve 154569201 start the dishwasher and let it fill and wash for 5 minutes, unlatch the door, remove the bottom rack and check the water level at the center near the spray arm support, the water level needs to be at least one(1)inch deep, if not there isn't enough water in the system to feed the upper spray arm properly. If the water level is in range or above, you'll need to check the impeller 154844101 for damaged vanes and the volute 807145201 and shift ball for obstructions and debris. Read More... Answered by AppliancePartsPros.com | Saturday, February 28, 2015