William M Richland , WA March 08, 2018 Appliance: Frigidaire Refrigerator LGHB2867PF0 Frigidaire Refrigerator Lghb2867pf0 / : Not defrosting. How to replace Defrost Thermostat. Replaced thermostat and heater. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes