My microwave sparks and makes a characteristic cracking sound when operating. Microwave repair begins with checking the cleanliness of the inner surface of the unit housing. A microwave oven can also spark if the magnetron and waveguide are dirty.
The main causes of sparking:
Burnt protective mica plate inside the chamber;
The coupler (mushroom) of the rotating plate burned out;
Using metal utensils;
Damage to the enamel coating of the internal walls of the chamber.
A spark is an electrical discharge or arc between two electrical conductors. Conductors can be metal objects, pieces of foil, metallized designs on dishes, etc. When a conductor is exposed to an alternating electromagnetic field, electricity and eddy currents induced by this field arise in it. When two conductors with different induced electric potentials find themselves at a distance smaller than the electric discharge separating them by the dielectric (in this case air) can hold, an electric discharge (electric arc) occurs between them. Here are the sparks in the microwave oven chamber. Therefore, when using a microwave oven, you should avoid using dishes with gold, silver and metal elements. When using foil, do not place individual pieces of foil closer than two centimeters to each other or to the walls of the chamber. The same applies to metal objects. When electrical discharges occur in the microwave oven chamber, an increased load occurs on the power circuits of the electrical circuit, which can lead to breakdown of the household appliance. You can’t do this without a workshop or service center specialist. In mild cases, the fuse link - the fuse against high currents - will fail. More serious malfunctions of the microwave oven may also occur, such as a malfunction of the magnetron, high-voltage diode or power transformer.
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Video sections (chapters):
0:00 Introduction
0:16 Microwave sparks
0:59 Microwave oven design
1:33 Checking and cleaning the magnetron
3:07 Cleaning the waveguide
5:32 Assembling a microwave oven
5:49 Checking the microwave operation
6:43 Conclusion
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And in this video you will see what to do if the Microwave works but does not heat • Микроволновка работает...
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