Kim B Holbrook , AZ May 23, 2016 Appliance: General Electric Refrigerator HSM25GFRESA Ge Refrigerator Hsm25gfresa: Refrigerator compartment would not cool below 60f. How to replace Refrigerator Defrost Heater And Bracket Assembly. Found on-line troubleshooting guides. Checked motherboard, showed infinite ohms on heater/thermostat circuit. Took apart freezer compartment, found defrost heater element was toast. Got parts from Appliance Part Pros. Use their How-To videos and parts diagrams to replace heater and gasket. Put freezer back together, and refrigerator got cool. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours