Unplug the refrigerator
Check that the power cord is plugged in securely
Verify the outlet has power
Reset the circuit breaker or replace the fuse if needed
Set the temperature controls to the correct setting
Clean the condenser coils
Make sure the vents inside are not blocked
Check that the door seals are clean and closing tightly
Replace damaged or worn door gaskets
Remove excess food blocking airflow
Defrost the freezer if there is heavy ice buildup
Check the evaporator fan for proper operation
Check the condenser fan for proper operation
Listen for the compressor running
Clean debris from the drain hole and drip pan
Replace a faulty light switch if the interior light stays on
Replace a broken thermostat if the unit will not cool
Replace a faulty start relay if the compressor will not start
Replace a damaged water filter if the ice maker or dispenser is affected
Call a qualified appliance technician for sealed-system or electrical repairs