Refrigerator door seal dirty? Clean it and try the paper test
Food residue on the refrigerator gasket can compromise the seal. Clean with mild dish soap and a damp cloth, dry, then check gentle resistance with a paper test.
Official LG guide to cleaning refrigerator door gaskets; source link only.
Link card to LG's official refrigerator door gasket cleaning instructions
Open source ↗Samsung and LG support materials note that hardened food debris in gasket folds can stop a refrigerator door from sealing. Samsung describes a simple check: paper closed into the door should meet slight resistance when pulled. Seal removal and replacement methods are model specific.