Andrew for Model Number FDB710LCS1 So, the upper sprayer on my unit hasn't been working and so I checked it tonight, and there is almost no water getting to the upper outlet. I removed the check ball (AP2109095), and it is working normally now. There is plenty of water in the basin, so I'm not sure what the issue could be. What does the check ball actually do? It doesn't float, so it doesn't seem to be a safety in case of under fill in the tub. Thanks!
Answer Andrew, You will want to make sure that the channel that the check ball sits in is clean and no residue in it to keep it from moving around. The check ball allows the unit to alternate between the top and bottom spray arms for better cleaning as it allows greater pressure to each one when rotating. Read More... Answered by AppliancePartsPros.com | Friday, April 25, 2014