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I turned the microwave on and heard a pop followed by a humming sound. Now it doesn't heat. I have power, the light comes on, the dish rotates along with a humming sound, no heat. I was thinking that maybe a fuse blew so I removed the panel but did not see any fuses. HELP!:confused:
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The loud pop does usually indicate a bad rectifier. Make sure to 1. Turn off power to the microwave first and 2. discharge the capacitor before attempting any repairs. - Replacement rectifier
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So this does not sound like an easy job, what do you think? would it just be easier to buy another?
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Actually, it's a fairly simple job, as long as the safety rules are followed re: disconnecting the power and discharging the capacitor. But, if you don't feel comfortable working on a microwave, please don't. Getting shocked from a high voltage capacitor could mean serious heart problems or even death. Rectifier is number 1 on this diagram and capacitor is number 2, right behind the control panel. Here is a page that among other things shows how to discharge a capacitor. It's a long page and has lots of info on it, so I would suggest doing a search for the phrase How To Discharge The High Voltage Capacitor (click Control and F for search while on that page).
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Rank: Member
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How do you know if it's the rectifier or the cap? I did 12volt for alittle over 9yrs and have seen some caps go bad. Nothing internally looks bad here. Thanks
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Rank: Member
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Thanks understood the hole. Now does the cap need to be discharged before taking a ohm reading? Didn't see any holes in the diode, but they dont give you a lot of area for working.
Didn't see the link at the bottom. Got it. Thanks
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