Jon A Turlock , CA December 30, 2014 Appliance: Frigidaire Dishwasher FDB520RHB2A Frigidaire Dishwasher Fdb520rhb2a: Lower spray arm & support came off and melted to the heating element inside the dishwasher while after i cleaned the filter underneath from years of build up. How to replace Dishwasher Lower Spray Arm. Came to your site after comparing prices and feedback. Bought New Lower Spray Arm & Lower Spray Arm Support from you all. Installed them with in 2 mins.I open up the dishwasher door slide out the dish rack below place the support in made sure it was in by lifting upward then pop in spray arm. Plug in the water and ran the dishwasher OMG Works great. 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes