Maris S Woodinville , WA October 14, 2017 Appliance: General Electric Refrigerator ZIRS36NMBRH Ge Refrigerator Zirs36nmbrh: The refrigerator temperature would vary from above 40F to below 30F. How to replace Temperature Control Ff. I replaced the temperature control inside the refrigerator. A relatively easy DIY job. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes