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Why is my model number 405.73162310 not heating? It worked yesterday!

The display, timer, keypad, light, and turntable all work fine. Just not heating. I opened the shroud and found a glass fuse that appears to be fine. I looked over all of the parts and don't see any issues. Is there another fuse that is hidden by plastic or metal shrouding? Or is there another part that I'm not aware of that is disconnecting the circuit? I know better than to poke around in there with the radiation and high powered capacitors!

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@mrfixits most common cause for microwaves not heating is a failed diode. That diode converts your A/C power to D/C , increasing the voltage to around 5,000V and powers the magnetron. You can test the diode with a multimeter and connect a 9-volt battery in series with the diode. When the leads are reversed, the diode should only have continuity in one direction. It is also possible that one of the door switches has failed. Check those switches for continuity when closed.

Again, be aware that microwaves store a lethal amount of power and getting zapped with that will leave a lasting impression!

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