Refrigerator runs constantly and is too cold, food freezing in fresh food compartment

Safety first: Unplug the unit before accessing sensors or dampers.

Steps:

• Check settings: Ensure the fridge is set to 37–40°F (3–4°C). Avoid the coldest setting unless necessary.
• Thermometer test: Place an appliance thermometer in the center of the fridge and check after several hours to confirm actual temperature.
• Inspect air damper: Locate the damper between freezer and fridge (often behind a grille). Ensure it is not stuck fully open due to ice or mechanical failure.
• Sensor check: If comfortable, test the fridge temperature sensor resistance at known temperatures. Replace if readings are far off spec.

Note: If the control board continues to run the compressor despite correct sensor readings, the board may need replacement by a professional.