5 signs your fridge compressor is failing

A healthy compressor runs for 10-30 minutes, shuts off for 10-30 minutes, repeats. If you notice yours running nonstop — even with the door closed and the room cool — the compressor is working harder than it should.

Possible causes: refrigerant leak, dirty condenser coils, failing compressor itself, or a stuck thermostat. The fix can be as simple as cleaning the coils (under or behind the unit) or as expensive as a compressor replacement. Cleaning the coils is the first thing to try — see our refrigerator repair guide for details.

New noise is the clearest early warning. A failing compressor sounds different than a healthy one — usually deeper, louder, sometimes with a click-click pattern as the start relay tries and fails.

If you hear repeated clicking every few minutes, that's almost always the start relay (a $30 part). If you hear constant grinding or a loud hum, it's the compressor itself heading toward failure.

This one's tricky because it can be the compressor OR the defrost system OR a damper. But on side-by-side and French-door units especially, a partially failing compressor will keep the freezer cold (which is closer to the cooling source) while the fridge slowly warms up.

If your milk's going bad but your ice is still rock-solid, get it diagnosed quickly. The compressor is on its way out and the food bills will add up fast.

Refrigerators run hot — that's normal. But if your hand can't stay on the back panel or the sides, the compressor is overheating. That's a sign it's working overtime, often because the start relay or capacitor is going bad and the compressor is straining.

This is the stage where you have maybe 1-2 weeks before failure. Don't ignore it.

A failing compressor often causes the freezer to defrost partially. You'll see water pooling under the unit or in the fridge compartment that didn't come from the icemaker line or water dispenser.

This means the freezer is losing temperature cycles — not always the compressor, but it's a strong indicator combined with any of the above signs.

If you see any 2 of these signs, get it diagnosed within a week. Compressor replacements run $400-700 on most brands. LG linear compressors from 2014-2018 are often covered by a class-action settlement — call us before paying out of pocket on those.

If your fridge is over 12 years old and the compressor is the main failure, it might be time to replace. We'll tell you straight.