Kathleen S Emmitsburg , MD January 06, 2018 Appliance: Frigidaire Refrigerator FRT21IL5DQP Frigidaire Refrigerator Frt21il5dqp: Old door gaskets. How to replace Refrigerator Freezer Door Gasket. Replaced freezer and refrig door gaskets. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes