A door gasket is the flexible rubber or vinyl seal around the door of a refrigerator, freezer, dishwasher, or oven that closes the gap between door and cabinet. Refrigerator gaskets contain a magnetic strip that pulls the door tight, keeping cold air in and warm, humid room air out of the cabinet.
Why it matters to you
A torn, flattened, or loose refrigerator gasket lets humid air in, so the compressor runs longer, frost forms faster, and moisture beads along the door edge. A small gasket problem can wear on far more expensive parts over time.
Practical guidance
Close the door on a strip of paper at several points around the frame; it should hold with light resistance. Wipe gaskets with warm, soapy water a few times a year, and replace one that is torn or no longer seals.