Howard P Fredericksburg , VA October 27, 2019 Appliance: Model 721860113010 Microwave ran intermittently because door would not turn on all the switches Parts diagram indicated that the microwave door when closed, turned several switches on. I replaced all the parts that were associated with the door lock. Also while there, put in a new charcoal filter. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes