James O North Tonawanda , NY January 15, 2017 Appliance: General Electric Refrigerator PFS22MISBWW Ge Refrigerator Pfs22misbww: The refrigerator was not maintaining temputure. How to replace Refrigerator Main Control Board. I ordered the main control board from APP's with came in 2 days.But I had a friend how is a repair tech and he identified the problem as an evaporator issue and not the control board. I am in the process of returning the control board. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes