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Microwave would start up, and sound like it was straining (drawing too much amperage) then would blow the breaker. Took

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Old 03-05-2017, 04:13 PM
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Default microwave blowing breaker
Model Number: LMV1920DW   Brand: -other-   Age: 5 - 10 years   

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Microwave would start up, and sound like it was straining (drawing too much amperage) then would blow the breaker. Took it apart, the HV transformer was literally fried. Replaced the transformer, checked the capacitor, magnitron and HV diode- all tested ok. Put it all back together, and started it up- same thing- looks like it browns out like it's drawing too much amperage, and then blows the breaker. My first thought is that the capacitor is bad despite the multimeter checking it as ok. On second check of the HV diode, I checked it with a resistor and 12V battery, and unfortunately put the positive terminal on the wrong side of the resistor, so blew it up. It was an HVR 1x diode- can you tell me which diodes are ok to replace it with?
Thanks,
Sean


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  #2 (permalink)  
Old 03-06-2017, 06:58 AM
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I couldn't find your model number, but these diodes all have pretty similar ratings, so this might work. Does it look like your old one?

LG 6021W3B001V Diode - AppliancePartsPros.com

Its for a slightly different model number MW.
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Old 03-06-2017, 08:55 AM
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The other one was an HVR-1X with 2219 on it. It was rectangular, not cylindrical, but I would think specs would be close. Any ideas on the cause of this microwave blowing breakers?
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