If you recently had your compressor replaced in your LG refrigerator and are now experiencing humming noises and slow cooling, there could be several reasons for these issues:
Normal Operation: Some humming noise is typical in refrigerators, especially when the compressor is running. However, if the noise is significantly louder or different from what you were used to before the compressor replacement, it's worth investigating further.
Air Circulation: After a compressor replacement, the refrigerator may take some time to reach the desired temperature. Ensure that the refrigerator is not overloaded with food, as this can obstruct proper air circulation and lead to longer cooling times.
Compressor Issues: While you just had the compressor replaced, there is a possibility of defects or improper installation. If the humming noise is accompanied by a noticeable vibration or if the refrigerator is not cooling efficiently, there might be an issue with the new compressor.
System Leak: If the refrigerator is taking a long time to get cold, there could be a refrigerant leak or a problem with the refrigerant charge. A refrigerant leak can impede the cooling process and make the compressor work harder, leading to humming sounds.
Condenser Fan: Check if the condenser fan, located at the back of the refrigerator, is working correctly. A faulty or obstructed condenser fan can cause the compressor to overheat, leading to humming noises.
Defrost Issues: If the refrigerator's defrost system is not functioning properly, ice buildup can occur on the evaporator coils, reducing cooling efficiency and causing the compressor to work harder.
Since the refrigerator was recently serviced, the best course of action would be to contact the LG customer support or the service center that performed the compressor replacement. They should investigate the humming noise and slow cooling to identify any potential issues with the new compressor or other components. If the refrigerator is still under warranty, the service and any necessary repairs should be covered.