1, check whether the power connection is normal. If the power supply is not connected correctly, the microwave oven can't heat the food.

2. Check whether the power cord is in poor contact, causing the microwave oven to go up and down.

3. Check whether the startup voltage of the microwave oven is low. Usually, the voltage required for the normal operation of microwave ovens is 220 volts. If the voltage is lower than 180 volts, the microwave oven cannot be used normally.

4. The position of the distribution switch of the microwave oven is misplaced, and the position of the weak current gear for heating.

The solution of microwave oven only turning without heating;

1, check whether the voltage is not enough, so the microwave oven rotates, but does not heat.

2. Check whether the connecting wire of the microwave oven falls off. If the connecting wire falls off and the microwave oven can't heat normally, connect the wire.

3. Check whether the high-voltage transformer and high-voltage capacitor of the microwave oven are damaged. If it is damaged, just replace the corresponding parts.

4. Check whether the magnetron of the microwave oven is damaged. If the magnetron is damaged, just replace the magnetron of the microwave oven.

5. Check whether the power controller of the microwave oven is connected. If there is no connection, it is possible that the motor of the power controller is damaged. Just replace the motor of the power controller.