Richard B Potomac Falls , VA December 27, 2018 Appliance: Samsung Refrigerator RB1944SL/XAA Samsung Refrigerator Rb1944sl/Xaa / : Alarm kept coming on every 3 minutes. How to replace Refrigerator Temperature Sensor. Replaced mother board and door switch. 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes