Carl C Garden City Park , NY February 03, 2018 Appliance: General Electric Microwave PVM1870SM3SS Ge Microwave Pvm1870sm3ss: No power to microwave./. How to replace Thermostat. Changed blown 20A fuse and thermal fuse. 18 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes