Michael M Ennis , TX January 30, 2017 Appliance: Samsung Refrigerator RS267LASH/XAA-0000 Samsung Refrigerator Rs267lash/Xaa-0000 / : Samsung refrigerator not cooling (freezer was working fine). How to replace Catalyst. Reviewed AppliancePartsPros.com troubleshooting and videos online and determined the Evaporator heater section was not defrosting coil. Replaced the Evap. Heater and Temp Sensors and while I had this apart, I changed the evap. fan motor as a preventive measure while I had this section of the refrigerator apart. YouTube Videos allowed this to be a very simple repair and the refrigerator is as good as new. Thank you AppliancepartsPros.com 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours