Refrigerator runs continuously and is too cold; food freezing in fresh food section.

Safety: Unplug the refrigerator before accessing sensors or the control board.

Steps:

• 1. Check settings: Verify that the temperature settings are not set to the coldest position. Adjust to a mid-range setting and monitor for 24 hours.
• 2. Inspect sensor: Test the refrigerator temperature sensor (NTC) for correct resistance. Replace if it reads much higher resistance than expected (indicating falsely cold readings are unlikely; often the opposite—falsely warm—causes overcooling).
• 3. Check damper: Ensure the air damper between freezer and refrigerator is not stuck fully open. Replace the damper assembly if it does not modulate.
• 4. Control board: If sensors and damper are good but the compressor and fans run constantly, the main control board may have a stuck relay or logic fault and should be replaced.