Bob W Farmington , MN November 29, 2018 Appliance: Samsung Refrigerator RB195BSSW/XAA Samsung Refrigerator Rb195bssw/Xaa / : Either the compressor wouldn’t start (no cooling) or it wouldn’t shut off (extreme cooling). How to replace Refrigerator Main Control Board Assembly. Replacing the circuit board was relatively easy and so far it has fixed the problem. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes