Bonnie Mae R Verona , WI November 10, 2021 Appliance: Frigidaire Dishwasher FDB635RBS1 Frigidaire Dishwasher Fdb635rbs1: The lower rack of my dishwasher had multiple prongs that were rusted and the rust was falling off into the dishwasher. How to replace Dishwasher Lower Dishrack Assembly. I purchased a lower rack from AppliancePartsPros.com because their price was lower than others I had researched. I pulled out the lower rack from the dishwasher and replaced it with the one AppliancePartsPros shipped to me. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes