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Refrigerator Not Cooling? Here's What's Actually Wrong.
A refrigerator that won't cool is the most expensive appliance to ignore — your food spoils before you can even troubleshoot. The good news: 90% of 'not cooling' calls come down to one of five specific failures, and we know exactly how to diagnose each one.
What's actually wrong
If the compressor isn't running at all, it's almost always the start relay (cheap part) before the compressor itself (expensive). Listen for a clicking sound — that's the relay trying.
If the freezer is cold but the fridge compartment is warm, the evaporator fan that pushes cold air into the fridge has likely failed. Common failure pattern.
Frost build-up on the back wall of the freezer means the defrost heater, defrost timer, or defrost thermostat has failed. Restricted airflow leads to a warm fridge.
If both compartments cool but unevenly, the damper that controls airflow between them has stuck. Quick part swap on most brands.
Sometimes the simple answer. Coils packed with dust can't release heat — the compressor runs constantly and never cools properly. Cleaning fixes it.
Quick checks you can do
- Listen — is the compressor running at all? A faint hum from the back means yes. Total silence means the compressor or relay has failed.
- Look at the back wall of the freezer. Frost build-up = defrost system. No frost = defrost is working.
- Pull the unit out and check the condenser coils underneath or behind. If they look like a wool sweater, vacuum them and wait 24 hours.
- If the freezer is cold but the fridge isn't, listen for the evaporator fan. No fan sound = fan failure.
If your fridge is over 15 years old and not cooling, the math often favors replacement. Anything newer — especially a built-in (Sub-Zero, KitchenAid, Viking) — is almost always worth repairing. Call us for an honest assessment before you spend $2,000+ on a new unit.
Call (631) 316-1756