The dollar-bill test: how to tell if your fridge door seal has failed

The rubber gasket around a fridge door does one of the least glamorous jobs in the kitchen and one of the most consequential: it's the only thing standing between a sealed cold box and a warm room. When it fails, it fails quietly — no alarm, just a compressor that runs more than it should and a fridge that's always slightly working harder. The classic check costs thirty seconds and one banknote.

The test

Close the door on a piece of paper money — or a sheet of paper — so half sticks out. Pull gently. If you feel resistance and the note drags, the seal is gripping at that spot. If it slides out like the door is barely closed, that section of gasket has lost its grip. Work your way around both doors — the hinge side and the bottom corner are where gaskets usually give up first. Do the same spot-check on the freezer door while you're there.

Before you buy a new gasket

A weak spot often isn't a worn seal but a dirty or misplaced one. First, clean the gasket all the way into its folds with warm soapy water and a soft brush — a film of grease or sticky residue is enough to kill the grip, and it's the same residue that you're already wiping down on the six-month schedule. Second, look at the door's hang: a fridge that's tilted slightly forward lets the doors swing open a fraction and never quite seat. Most fridges level with adjustable feet or front rollers; aim for a hair of backward tilt so doors fall closed. Third, check for folds: a gasket lifted out of its channel in one corner can often be pressed or warmed back into shape.

When it really is the seal

Gaskets crack with age, split at the corners, and go flat where they've been pinned open by a shelf for years. Visible cracks, torn sections, or a note that slides out all the way round mean replacement — and this is a genuinely homeowner-doable job on most machines: gaskets are orderable by model number, usually push or screw into a channel, and the new one seats better if you warm it first (a hairdryer on low relaxes the folds). If the model is old enough that the gasket is discontinued or the doors themselves are misaligned, weigh the repair against the machine's age the way you would with any appliance.

Why it's worth the thirty seconds

A leaking seal shows up twice on your bill: warm air leaks in, the compressor short-cycles to compensate, and cold air spills out every time the door fights the seal and reopens. It compounds with everything else that makes a fridge work hard — shelves packed solid, coils carpeted in dust, or a machine that can't hold temperature for any of the reasons in the warm-fridge guide. Two of the fridge's three biggest enemies are invisible; the seal is the one you can check in under a minute.

Reviewed September 2026 · general information, not professional advice.