Symptoms
• Refrigerator compartment not cooling to the set temperature
• Freezer compartment cooling normally while fridge section remains warm
• Error code E12 displayed on the digital control panel
• Audible beeping or alarm sounds from the refrigerator
• Compressor running continuously without cycling off
• Food spoiling faster than normal in the refrigerator section
• Frost buildup in freezer compartment despite warm fridge section
Possible Causes
• Defective temperature sensor (thermistor) in the refrigerator compartment
• Loose or disconnected wiring harness between the sensor and control board
• Damaged or corroded sensor connector due to moisture exposure
• Failed main control board unable to read sensor signals
• Faulty damper control that regulates airflow from freezer to fridge section
• Power supply voltage fluctuations on the 120V household circuit
• Freezer section sensor failure affecting dual-zone temperature control
Safety Checks You Can Do
• Unplug the refrigerator from the 120V outlet for 60 seconds, then plug it back in to perform a hard reset of the control system
• Check your home's circuit breaker to ensure the refrigerator is on a dedicated 120V breaker and not sharing circuits with other appliances
• Verify the refrigerator is level by checking with a spirit level—adjust the front leveling feet if the unit tilts backward or forward, as improper leveling affects cooling performance
• Inspect the refrigerator door seals and gaskets on all compartments for damage, cracks, or gaps that allow warm air infiltration
• Confirm the temperature settings are within the recommended USA range of 35-38°F for the refrigerator compartment and 0°F for the freezer
• Check that the refrigerator is plugged into a dedicated 120V outlet and not connected through an extension cord or power strip
• Verify the freezer compartment is cooling properly—if both sections are warm, the issue may be elsewhere in the cooling system
• Clean the condenser coils located at the back or bottom of the refrigerator using a vacuum with a brush attachment to remove dust buildup that restricts airflow
• Ensure proper ventilation around the refrigerator by maintaining at least 1 inch of clearance from walls and ensure rear vents are not blocked
• Check that internal air vents between the freezer and refrigerator compartments are not blocked by food items or ice buildup
Safety First
Always disconnect the appliance from power before performing any checks. If you are unsure about any step, please contact a qualified technician.