1, check the cooling effect of the refrigerator. Set the temperature of the refrigerator in a suitable refrigeration temperature range, wait for a period of time after power on, and observe whether the refrigerator can reach the preset temperature. If the cooling effect is normal, the repair has been successful.

2. Pay attention to the noise and vibration of the refrigerator. The refrigerator should be very quiet when working. Improper maintenance may cause problems such as noise and vibration. Therefore, it is necessary to listen carefully to the sound when the refrigerator is running and observe whether there is abnormal vibration to ensure good maintenance effect.