Andy K Durham , NC March 23, 2016 Appliance: Bosch GE010-010 Bosch Ge010-010: Refrigerator wouldn't cool. How to replace Refrigerator Defrost Heater. Replaced heater thermostat and defrost thermostat. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours