The main reason why the microwave oven rotates normally but does not heat is because of the following reasons:

1. The high-voltage fuse is blown. At this time, replace the high-voltage fuse and you can immediately remove the short circuit of the fuse. That's fine, but you'll have to replace it with a new fuse later.

2. The high-voltage diode is short-circuited. At this time, the high-voltage diode must be replaced with a new one. If you are careful, you will find that if the high-voltage diode is damaged, the sound of the microwave oven will be relatively low.

3. The heating tube (magnetron) of the microwave oven is damaged. Just replace it with a new magnetron.

Extended information:

Precautions for using microwave ovens:

1. Avoid heating for too long. Microwave ovens use high-frequency heating and the heating speed is very fast. Too much time can cause the food to dry out, harden, and even produce toxins. Therefore, when using, the time should be adjusted according to the type of food.

2. Avoid heating ordinary plastic containers and plastic bags in a microwave oven. Ordinary plastic containers and plastic bags are not resistant to high temperatures and are easily deformed when heated. In addition, it may release toxic substances at high temperatures and endanger health. You should try to choose high-temperature-resistant microwave-specific containers.

3. Avoid heating fried food. High temperature will cause oil to splash, which may cause open flames and cause fire. If a fire accidentally breaks out in the furnace, do not open the door immediately. Turn off the power first and wait until the fire is extinguished before opening the door.

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