There was something wrong with my microwave the day before yesterday. It turned and turned, but it didn't heat up. I went to the repair shop and asked, and the faults ranged from 178-230 yuan, but my microwave oven was just bought in 250 yuan. I don't think it's worth asking someone to replace it. I want to try it myself, so I started to study it in the spirit of continuing to use it if it is repaired well, and selling scrap iron if it is not repaired well. I watched the maintenance videos of various experts on the Internet and got a basic understanding of the faulty parts. I also have a general understanding of the reasons for the failure of microwave heating, so I will share it for your reference ~

1.？ Control circuit board failure: The heating function of microwave oven is controlled by the control circuit board. If the control circuit board fails, the microwave oven will not heat normally. According to the information I found, a new control circuit board needs to be replaced.

2.？ Radiation tube failure: the heating function of microwave oven is realized by radiation tube. If the radiation tube fails, the microwave oven will not produce heating effect. At this time, we need to replace the new radiation tube.

3.？ Failure of heating resistor: The heating function of microwave oven is realized by heating resistor. If the heating resistor fails, the microwave oven will not be able to heat normally. As far as I know, it needs to be replaced with a new heating resistor.

4. The wire is broken: the heating function of the microwave oven is affected by the wire. If the wire is broken, the microwave oven can't heat normally. It is necessary to check whether the wiring is short-circuited. If found, the broken line segment needs to be repaired.