Lorraine W San Benito , TX July 06, 2019 Appliance: Frigidaire Dishwasher, Built-In FBD2400KB10B Frigidaire Dishwasher Fbd2400kb10b: Needed to replace both racks in a dishwasher. How to replace Dishwasher Lower Rack Assembly. Purchased two new dishwasher racks and they fit perfect. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes