Dick L Valdosta , GA November 07, 2014 Appliance: General Electric Refrigerator PSS29NSTESS Ge Refrigerator Pss29nstess: Temperature readings for both the refrigerater and the freezer were inconsistent numbers constantly changed and neither side was cooling properly. How to replace Board Asm Main Control. I replaced the main control board. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes