Question about Thermador SMW272 Electric Double Oven

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When trying to use microwave on 15 year old thermador double oven there is a really loud buzzing rattleing type noise

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Hi


The loud buzzing sound is due to a faulty magnetron. Please check part#33 in the diagram---


when trying to use microwave - daniel_s_10.gif

Before disassembling the microwave please unplug it for one hour to let the current drain. Use a metal screwdriver and touch the both terminals of the voltage capacitor to drain current from the capacitor. You can check the magnetron resistance using multimeter, resistance between filament to chassis should be infinite (will show OL on multimeter, on Rx1000 scale) and filament terminal resistance should be less than 1 ohm (on Rx1 scale). Hope this helps... Please post back if you need more information.

Daniel

Posted on Nov 11, 2010

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