Refrigerator maintenance: coils, gaskets and the six-month filter rhythm

4 min read · updated September 28, 2026 · White Goods Verified

Refrigerators are the only appliance that runs every minute of every day, and their failure modes are boring and predictable: clogged coils, tired gaskets, a forgotten water filter. Twenty minutes a year prevents the expensive version of all three. Here is the rhythm.

Key takeaways

Vacuum the condenser coils every six months (quarterly with pets) — clogged coils are the top cause of compressor failure and runaway energy bills.
Test door gaskets with the paper test twice a year; a leaking seal makes the compressor run constantly.
Replace water filters on the manufacturer's rhythm — typically every six months — or flow slows and taste suffers.
Keep the fridge at 37-40°F and the freezer at 0°F; check with an appliance thermometer, not the dial.

The coils: twice a year, or quarterly with pets

Condenser coils (behind the kick plate or on the back) radiate the heat your fridge removes from the food. Dust-coated coils make the compressor run hot and long — the leading cause of premature compressor failure and the reason a 'fine' fridge suddenly doubles its energy use.

Unplug or flip the power switch, expose the coils per the manual, and vacuum with a brush attachment. Six months is the rhythm; pet-heavy homes shed enough dander to need quarterly.

The gaskets: the paper test

Close a sheet of paper in the door and pull — firm resistance means the seal works; a sliding pull means cold air is escaping. Wipe gaskets monthly with warm soapy water, and check for tears at the corners where they crack first.

A failing gasket shows up as condensation around the door and a compressor that never cycles off. Replacement gaskets are a clip-on part on most models.

The water filter: the six-month rhythm

Replace the internal water filter roughly every six months (or per the indicator). Overdue filters slow the dispenser flow and eventually shed carbon fines into the water. If you never use the dispenser, bypass plugs exist for most models.

Temperatures: trust the thermometer

Set the fridge to 37-40°F and the freezer to 0°F, and verify with a standalone appliance thermometer — dial settings are numbered, not degrees, and the in-door display reads the air, not the milk. Keep interior vents unblocked; a bag of spinach against a vent causes the frost-and-warm-spot complaints that fill service forums.

Frequently asked questions

How often should I clean refrigerator coils?

Every six months for most homes, quarterly if you have pets that shed. Coils behind the kick plate or on the back pull heat out of the cabinet — clogged ones are the most preventable cause of compressor failure.

Why is my refrigerator running constantly?

In order of likelihood: failing door gaskets leaking cold air, dusty coils rejecting heat poorly, an overheated kitchen, or a vent blocked inside the cabinet. Work through that list before calling service — three of the four are free to fix.

Where should the fridge temperature be set?

37-40°F for the fresh-food compartment and 0°F for the freezer, verified with an appliance thermometer. Above 40°F, food safety windows shorten; below 35°F, produce freezes.