Question about Sharp R-530ES Microwave Oven

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Our Sharp microwave oven turns on, makes a loud humming noise, starts to smell like something is burning, but doesn't heat. Well, actually, we don't think it heats, we're too scared to let it run because of the burnt smell.

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  • bandmblomqui Dec 11, 2009

    Tried cleaning the wave guide, unfortunately didn't help. When it runs, there is a popping sound as the burning smell begins. Smells like wires overheating.

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The loud "hum" together with the burning smell usually indicates a bad Diode (attached to the High Voltage Capacitor-about the size of the cap on a pen.) Many times you will see where it has burned, and in a few instances disintegrated, and you will certainly smell the pugnant burned odor on the Diode. Easy to replace, and a low cost part.

Posted on Dec 16, 2011

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Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} This can be caused by grease etc. inside the oven and on the wave guide which is the paper like thing in the oven. If you can remove it look for burnt areas which may can be scraped off or you may need to replace it. An appliance parts store usually has the material you can cut to fit you own.

Posted on Dec 10, 2009

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