William C Indianapolis , IN February 28, 2016 Appliance: LG Refrigerator LSC27926ST Lg Side-By-Side Refrigerator Lsc27926st: Er dh error code. How to replace Controller Assembly (Main Control Board). The only thing I needed to do was let the freezer defrost, take it all apart and replace the controller assembly. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours