Edward V Dayton , MN December 06, 2014 Appliance: Samsung Refrigerator RB2055SL/XAA Samsung Refrigerator Rb2055sl/Xaa: I needed to unplug and replug the refrigerator to make it keep cooling. How to replace Refrigerator Temperature Sensor. Mr Appliance came out and misdiagnosed the problem for $80. No refund so I guessed and bought the sensors that serve the defrost mechanism. It fixed the machine. Now I have to deal with hacks from Mr. Appliance repair service. They told me the sensors tested good! 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes