Timothy E Tontogany , OH August 11, 2025 Appliance: Whirlpool Undercounter Dishwasher WDF310PAAB4 Whirlpool Dishwasher Wdf310paab4: Clogged sump filter and pump filter. How to replace Sump Filter. Removed both filters, used 3M non-scratch pad to remove calcium type build up in and around sump, ran one cycle, and installed the new filters. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes