Frederick S Chocowinity , NC August 07, 2023 Appliance: Frigidaire Refrigerator FFTR1821QB3 Frigidaire Refrigerator Fftr1821qb3: Frost buildup just inside rim of freezer compartment. How to replace Freezer Door Gasket (Blk). Replaced the magnetic freezer door gasket. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes