Whirlpool-over-the-range-microwave-doesnt-heat-up-food, disconnect the microwave from its power source. remove the microwave’s cabinet to locate the magnetron. clean up the microwave cavity if needed; discharge the high voltage capacitor to ensure that the high voltage diode is working and the mounting bolts are tightened.. If you'd like to support the channel, you can do so by shopping for tools or whatever you need on amazon through this link, https://amzn.to/2mfxmeq type in t..., start right here find appliance parts, lawn & garden equipment parts, heating & cooling parts and more from the top brands in the industry here. click on shop parts, or select the kind of product you're working with on the left and we'll help you find the right part. shop parts.

Use a metal (not the shiny chrome type) screwdriver with a insulated handle to short across (touch both at the same time) the terminals of the high voltage capacitor to discharge it. with the microwave unplugged., the diode in your microwave works with the capacitor to double the voltage, which is necessary to power the magnetron, which then heats the food. as such, if the diode burns out, your microwave will be powered but not have enough power to heat your food..

When your microwave turns on but does not heat up, it may mean the door switch is broken. the door switch signals other microwave components to supply power when closed, and to stop heating when open. the door switch can also be called an interlock switch., start right here find appliance parts, lawn & garden equipment parts, heating & cooling parts and more from the top brands in the industry here. click on shop parts, or select the kind of product you're working with on the left and we'll help you find the right part. shop parts.

The diode converts the a/c power output of the transformer to d/c, doubling the voltage to nearly 5,000 volts. this high voltage powers the magnetron to heat the food. if the diode burns out, the magnetron won’t receive enough voltage to operate, preventing the microwave from heating. when the diode fails, it is often visibly burned out., i have a kitchenaid microwave kems378gss0. so the lights on, the fan's running, and the carousel is turning, but only intermittent heating. before you jump in with the magnetron needs replacing, please read on..

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