You can hear the compressor running, the fridge feels like it's working — but the temperature inside keeps climbing and your food is at risk. This is one of the more common calls we receive, and it has a manageable set of causes.
Start With the Condenser Coils
Condenser coils release heat from the refrigerant as it circulates. When they're coated in dust and pet hair — which happens gradually in most homes — they can't shed heat efficiently. The compressor runs harder and longer but can't maintain temperature. Cleaning the coils with a coil brush every 6 to 12 months is the single most effective thing you can do to prevent this problem.
Coils are typically located at the back of the fridge or underneath it, behind a removable grille. Cleaning them isn't difficult if you have a long-bristled brush and a few minutes.
The Evaporator Fan
If the coils are clean, the next thing to check is the evaporator fan. This fan circulates cold air from the evaporator coils throughout the fridge and freezer. If it stops working — due to a failed motor or ice blockage — the fridge section warms up even though the freezer may still be cold.
Open the freezer while the fridge is running. You should hear a fan. If the freezer is cold but the fan is silent, the evaporator fan is likely the issue.
Defrost System Failure
Modern refrigerators run automatic defrost cycles to prevent ice from building up on the evaporator coils. The defrost heater melts any accumulated frost, the defrost thermostat controls the temperature, and a timer or control board initiates the cycle. If any one of these components fails, frost builds up until it completely blocks airflow — even though the compressor keeps running.
The telltale sign of a defrost problem is frost visible at the back of the freezer, combined with a warm fridge compartment. The fridge freezer door may also be harder to open than usual because of ice buildup around the seal.
Compressor or Sealed System Issues
If the coils are clean, the fan is working, and the defrost system tests fine, the problem may be in the sealed refrigerant system — the compressor, condenser, or refrigerant itself. This is the more expensive repair and requires a technician certified to handle refrigerant.
Before concluding it's a sealed system issue, a technician should measure compressor pressures and check for refrigerant leaks. These tests confirm the diagnosis before any expensive parts are ordered.
When to Call
If your fridge is running but not cooling, check the coils first. If they're clean and the problem persists, call a technician. Food spoilage makes this a time-sensitive problem, and a proper diagnosis on the same day you call is a much better outcome than waiting to see if it resolves on its own. It won't.