They both had a failed relay on the control board. Only a licensed technician should replace the magnetron.) Due to the high running voltage and the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. (Warning: The microwave oven can store a lethal amount of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. The magnetron is not repairable-if the magnetron is burned out, you must replace it. If the magnetron burns out, the microwave won’t heat.
The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. Only a licensed technician should replace a door switch.) Due to the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. If any of the door switches does not have continuity, replace it. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches fails, the microwave will not start or heat. When the microwave door closes, the door switches actuate in sequence to ensure that the door is closed properly. Most microwaves have three or four door switches. Only a licensed technician should replace the diode.) When the leads are reversed, the diode should only have continuity in one direction.
Oven timer clock repair series#
If inspecting the diode proves inconclusive, test it with a multimeter that uses a 9-volt battery or put a 9-volt battery in series with the diode. Inspect the diode and if the diode is burned out, replace it. When the diode fails, it is often visibly burned out. If the diode burns out, the magnetron won’t receive enough voltage to operate, preventing the microwave from heating.
This high voltage powers the magnetron to heat the food. The diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. I won't touch the inside of one like this. Because working on one of these might be considered suicide. Make sure your life insurance is paid up and there is no suicide clause in it.
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