Causes of the noise of the refrigerator in the freezer
1. The freezer of the indirect cooling model makes a "click". Trouble phenomenon: The freezer makes a "click" during the operation of the compressor. Failure analysis: the fan blades in the freezer are icing. The reason is that it does not defrost, and it involves all components of the defrost circuit. Troubleshooting: Plug in the freezer power supply, turn the defrost timing adjustment shaft clockwise to the defrost position. When you hear a "click" sound, it is the defrost point. Observe the working current G of the freezer.
 ①The working current of the freezer is about 0.5A, indicating that the defrost heater is working. Based on this, it is inferred that the defrost heater and the defrost thermostat and superheat insurance are normal, but the defrost timer has problems, and most of them are If the internal gear is stuck, just turn on the defrost timer to clean up the internal dirt. Of course, the defrost timer can also be replaced as a whole, but the same model should be used.
②The working current of the freezer is close to zero, indicating that the defrost heater is not working. At this time, the resistance value of the defrost timer coil should be measured in turn (should be around 8kQ); observe the defrost temperature controller, the internal water or corrosive state, the disconnection state below -5℃ is damaged: measure the defrost heating The resistance value of the device, infinity is damage (should be between 300CY-500Q); when measuring the superheat fuse, infinity is damage.
2. Indirect cooling secondary failure has high noise and the fan motor burns out. Failure phenomenon: The cooling is normal after maintenance, and the cooling appears after two weeks and the noise is loud.
3. The freezer fan motor burns out again. Fault analysis: the wrong model of the defrost timer is used. Troubleshooting:
①Replace the defrost timer of the same model, or modify the defrost timer, that is, replace the Z-shaped reed in the original defrost timer with a new defrost timer Z plate:
② Replace the fan motor.
[Note] Wrong model of the defrost timer will cause no defrost, excessive frost in the freezer, resulting in frosting of the fan blades, increased load and burning of the fan motor.
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