Patricia P Alpine , CA March 01, 2015 Appliance: Jenn-Air Over The Range Microwave JMC7000ADB Jenn-Air Microwave Jmc7000adb: Would not heat. How to replace Magnetron. We ordered the Magnetron, it arrived promptly My husband and son installed it with no problem saving us a lot of money Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes