Maury L Thornton , CO December 03, 2018 Appliance: General Electric Microwave PNM1871SM1SS Ge Microwave Pnm1871sm1ss: Our GE profile microwave oven stopped heating water. How to replace High Voltage Capacitor For Microwave. I found on the web that the growl I heard when I tried to heat water, unsuccessfully, was a bad magnetron. But I wanted to replace the HV capacitor and diode also on my 10-year-old GE Profile Microwave Oven. The service I received from Appliance Parts Pros.com was superb. Quick delivery and easy repair got my oven back in like-new condition. Thanks for your help APP.com! - Maury Logue Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes