A refrigerator is present in every home today. Like all appliances, it makes certain sounds and noises when it is in operation. However, there are cases where the sounds made by the refrigerator are the norm, while in others it is a sign of malfunction.
Let’s consider different variants, when the crackling noise during operation of the device is quite normal and when it is worth paying attention to it because it is a sign of malfunction.
When a crackling fridge is normal
Crackling in your fridge can occur for a variety of reasons. Here are a number of situations where this phenomenon is quite normal:
The plastic deforms as a result of exposure and temperature fluctuations. When the unit gains temperature, the wall at the back may crack. This is found in new units and also after defrosting or switching the unit off/on.
Contact of the pipes or the compressor with foreign bodies. The crackling sound then emanates from the rear of the unit. It is sufficient to eliminate contact of the above elements with nearby objects and the problem is resolved.
The unit is not level. If this is a problem, it is sufficient to adjust the feet of the refrigerator. You can check that the unit is level by using a normal household spirit level.
The unit’s socket outlet is defective. If you hear a crackling noise when switching the motor on/off, this is a sign of a faulty socket, which reacts to changes in the level of electricity consumption. An electrician called by you will rectify the situation.
Possible malfunctions requiring repair
It is not uncommon for the crackling sound made by a unit to be a sign of a faulty component.
- The NO FROST defrost system is not working.
There may be broken elements in the defrost system in the form of:
- a fuse;
- Sensor (defroster).
If the defrost system is defective, ice will start to freeze in the compartments and the fan blades will rub against it. A crackling noise is emitted from the rear of the refrigerator.
The solution is to defrost the appliance. This will cause the ice to thaw and the fan to operate normally. However, the defrost system will have to be repaired by a workshop. If the ice is not removed, the fan will stop working, causing the motor to break. This results in expensive repairs to the unit in the service center.
- The compressor is defective.
The compressor can break down due to overheating, which occurs if there is damage to the motor winding. The motor is short-circuited, the protection relay is activated and the motor shuts down.
If this fault occurs, a crackling noise occurs when the relay is triggered. The refrigerator will then try to switch on again, but the cycle will repeat over and over again, i.e. the unit will operate in on/off mode.
To rectify the problem, replace the compressor.
- Failure of the starter relay.
The starter relay is responsible for assisting the engine when it starts. If it fails, the starting current will be low and the compressor will not start and will shut down immediately.
If this fault occurs, the unit will switch on frequently and switch off immediately. The chamber will stop freezing (one in twin-compressor models, both in single-compressor models).
The relay must be replaced with a new one.
- The control unit has burned out.
Due to frequent power surges and mains surges, the following elements in the control unit burn out:
If you hear a crackling noise followed by a popping noise and then the unit switches off and does not switch on, this indicates a burned control unit.
There are two ways to rectify the fault:
- replace the old unit with a new one;
- diagnose the board, and replace the burned-out contacts, radio elements, and tracks.
- The power plug or cord is damaged.
A crackling noise will be heard if the contact is faulty. Replacing the wire or plug will eliminate the problem completely.
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