The defrost timer will click when the automatic defrost cycle begins and ends. The thermostat control (or refrigerator control, depending on the model) will also click when cycling on and off.
Rattling noises may come from the flow of refrigerant, the water line, or items stored on top of the refrigerator.
Your refrigerator is designed to run more efficiently to keep your food items at the desired temperature. The high efficiency compressor may cause your new refrigerator to run longer than your old one, and you may hear a pulsating or 
You may hear the evaporator fan motor circulating the air through the refrigerator and freezer compartments.
As each cycle ends, you may hear a gurgling sound due to the refrigerant flowing in your refrigerator.
Contraction and expansion of the inside walls may cause a popping noise.
Water dripping on the defrost heater during a defrost cycle may cause a sizzling sound.
You may hear air being forced over the condenser by the condenser fan.
You may hear water running into the drain pan during the defrost cycle.
Due to refrigerator's low energy consumption design, the fans will remain off by the door switch activates the inner compartment light.
LBC2252, LDC2272, LRBC2051 specifications
LG Electronics has established itself as a leader in the home appliance sector, known for its innovative technology and commitment to quality. The LG LRBC2051, LDC2272, and LBC2252 are three notable models that exemplify the brand's dedication to efficiency and modern design, catering to a variety of consumer needs.Starting with the LG LRBC2051, this refrigerator is designed for optimal freshness and convenience. One of its standout features is the Smart Inverter Compressor, which intelligently adjusts cooling performance based on the amount of food stored, resulting in energy savings and reduced noise levels. The multi-air flow system ensures even cooling throughout the refrigerator, preventing hot spots and promoting the longevity of food. Additionally, the LRBC2051 boasts a sleek design with a fingerprint-resistant finish, making it both functional and aesthetically pleasing for any kitchen.
Next, the LDC2272 model takes innovation a step further with its Door-in-Door design, allowing easy access to frequently used items without exposing the entire refrigerator compartment. This feature minimizes cold air loss and enhances energy efficiency. The LDC2272 also includes a Smart Diagnosis feature, which helps users solve issues quickly via a smartphone app, reducing service call costs. Combined with a spacious interior and adjustable shelving, this model balances style and practicality seamlessly.
Lastly, the LG LBC2252 refrigerator is ideal for families, offering a robust storage capacity and versatile organization options. It features a sleek, modern look with LED lighting that illuminates the interior, making it easy to find items at a glance. The water and ice dispenser is another highlight, providing convenient access to refreshing drinks while maintaining the cleanliness of the fridge's interior. The smart cooling system actively monitors and maintains optimal humidity levels, ensuring perishables stay fresher for longer.
In summary, LG Electronics has made significant strides in refrigerator technology with models like the LRBC2051, LDC2272, and LBC2252. Equipped with advanced features like Smart Inverter Compressor, Door-in-Door design, and smart cooling systems, these refrigerators demonstrate LG's commitment to enhancing the user experience, promoting energy efficiency, and preserving food freshness. Each model caters to specific consumer needs, making them excellent choices for modern kitchens.