Leslie S Oxford , MI March 14, 2018 Appliance: General Electric Microwave PVM1870DM3BB Ge Microwave Pvm1870dm3bb: Microwave had no power. How to replace Door Switch. Ordered door switches, but didn't solve problem. Sent them back for credit. Ordered thermostat and it solved the problem. Microwave now works fine. The unit is only 7 years old and hope to get another 7 or more out of it. Thanks. 8 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes