Michael S Mableton , GA May 31, 2021 Appliance: LG Refrigerator LFX25960ST/00 Lg Refrigerator Lfx25960st/00: Error code ER DH on LG refrigerator, freezer frosted over. How to replace Defrost Sensor Assembly. I had to change the defroster by removing the freezer back panel, used a dryer to defrost, and unplugging the defroster heating element and replaced it with the new one. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours