Modern cooling systems No Frost (No Frost) in LG refrigerators have created a strong but erroneous opinion among users that these devices do not require defrosting at all. Many owners believe that smart equipment can independently cope with any ice deposits forever. However, the reality is that even the most advanced models require periodic maintenance to maintain their efficiency and durability.
Although LG uses advanced air circulation technologies, it is impossible to completely eliminate the formation of ice in hard-to-reach areas of the evaporator. Over time, the thickness of the ice crust can increase, which leads to decreased cooling quality and increased energy consumption. In this article, we will analyze in detail why this happens and how to carry out the procedure safely for your unit.
You need to understand that ignoring routine maintenance can lead to serious mechanical breakdowns. Defrosting an LG refrigerator is not just a hygienic procedure, but an important technical necessity. Let's look at how often this needs to be done and what tools you will need to successfully complete the task.
Why ice forms in the No Frost system
The principle of operation of the system No Frost is based on the forced circulation of dry cold air through the chambers. The moisture contained in the products and gets inside when the doors are opened settles on the coldest element - the evaporator, which is hidden behind the back wall. It turns on periodically Defrost heating element, which melts this ice, and the water flows into a special pan.
Despite automation, the system does not always have time to remove all the moisture, especially if:
- ❄️ Refrigerator door often or for a long time remains open.
- ❄️ The rubber seal is damaged, and warm air constantly gets into the chamber.
- ❄️ The drainage hole is clogged, and the melt water does not have time to leave.
- ❄️ Products are stored without packaging and actively evaporate moisture.
As a result, a “fur coat” grows in the hidden cavities of the evaporator, which interferes with the normal flow of air. LG refrigerator begins to work with increased load, trying to compensate for the impaired heat transfer. This is the main reason why even appliances with the No Frost system need to be defrosted manually at least once a year.
⚠️ Attention: If you notice that the back wall in the refrigerator compartment is covered with frost or ice, this is a sure sign that the defrosting system is not working correctly or requires urgent manual intervention defrosting.
Preparation for the defrosting procedure
Before starting the process, you need to properly prepare the workspace and the unit itself. Safety is priority number one. Make sure there is enough space nearby to place all food items removed from the chambers. In winter, you can take food out to the balcony (if the temperature there is not lower than -5°C), in summer you will have to use thermal bags or cooler bags.
You will also need the following equipment:
- 🧽 Soft microfiber or cotton rags.
- 🧼 Non-aggressive detergent (special for refrigerators or a weak soda solution).
- 🪣 Container for collecting water (basin or bucket).
- 🧹 A syringe or bulb for cleaning the drainage.
It is important to empty only shelves, but also remove all removable elements: drawers, trays, grilles and glass shelves. It is better to wash them separately under running water. LG two-chamber refrigerator has a complex internal geometry, and access to the corners will be difficult if you do not remove all excess.
☑️ Preparation for defrosting
Step-by-step instructions: how to properly turn off and defrost
The defrosting process requires a sequence of actions. First you need to completely de-energize the device. Find the power cord and unplug the plug from the socket. Important: do not pull on the cord itself, hold onto the body of the plug so as not to damage the contacts. After turning off, leave the refrigerator and freezer doors wide open.
Now you need to speed up the natural process of melting ice, but this must be done carefully:
- Place containers with warm (not hot!) water inside the chambers.
- Close doors for 15-20 minutes so that the steam softens the ice crust.
- Open the doors and carefully remove thawed pieces of ice with a wooden or plastic spatula.
- Wipe the internal surfaces with a dry cloth, absorbing moisture.
Do not use hair dryers or heaters under any circumstances or sharp objects (knives, screwdrivers) to chip ice. Direct heating with a hairdryer can melt the plastic parts of the evaporator, and a puncture with a sharp object will damage the cooling system beyond repair. Allow the ice to melt on its own or under the influence of the heat of warm water.
⚠️ Attention: If you use warm water to speed up the process, be careful not to get boiling water on the glass shelves. A sharp change in temperature can lead to their cracking.
Cleaning the drainage system
One of the most common reasons for water appearing on the floor or inside the refrigerator is a clogged drainage hole. In two-chamber models LG it is usually located on the back wall of the refrigerator compartment, closer to the bottom. Through it, condensate and melt water flow into the evaporator.
For cleaning, use a special brush (often included) or a medical syringe with a soft rubber tube. Carefully insert the tool into the hole and make several forward movements. Then rinse the canal with warm water. If the water leaves quickly and with a characteristic gurgle, the system is clean.
Regular drainage checks prevent the formation of ice plugs that block the outflow of moisture. This is especially true if you store food in open containers. Clean drainage is the key to a dry and clean inner chamber.
Washing and disinfection of internal surfaces
While the ice is melting, it’s time to take care of hygiene. Use a weak solution of baking soda (1 tablespoon per liter of water) or a special refrigerator cleaner. Avoid aggressive chemicals with chlorine or abrasive particles, which can damage the antibacterial coating Hygiene Fresh+ (if it is present in your model).
Thoroughly wipe all surfaces, including the ceiling and bottom of the chambers. Pay special attention to the rubber seals on the doors. Dirt and mold often accumulate in their folds. Wipe them with a cotton swab dipped in soapy water.
After washing, be sure to wipe all surfaces dry with a clean cloth. Remaining moisture may freeze again upon first start-up, forming a new layer of ice. Allow the insides of the refrigerator to dry completely for 15-20 minutes with the doors open.
What should not be used to clean the refrigerator?
Do not use solvents, gasoline, acetone or strong acids. They can destroy plastic and damage painted metal parts, and also leave a persistent chemical odor that is absorbed into the food.
Table: defrosting time for different models
The time required for complete defrosting depends on the volume of the chambers, the thickness of the ice and the temperature in the room. Below are approximate data for popular series LG.
| Model / Series | Total volume (l) | Average defrosting time | Features |
|---|---|---|---|
| LG GA-B409 | 300-320 | 4-6 hours | Standard No Frost system |
| LG GC-B509 | 350-380 | 6-8 hours | Increased freezer volume |
| LG DoorCooling+ | 300-400 | 5-7 hours | Additional air ducts |
| LG InstaView | 400+ | 8-10 hours | Complicated ventilation system |
Remember that these data are approximate. If your freezer has a thick layer of ice due to a problem, the process may take longer. Do not try to speed it up by mechanical action.
First start-up after defrosting
When you are sure that the inside is dry and clean, you can start starting. Close all doors and turn on the refrigerator. Compressor should start smoothly, without loud knocking or buzzing. Let the device run idle (without food) for 2-4 hours. This is necessary to stabilize the temperature.
During this period, the system No Frost will gain the required cold, and the automation will check the operation of the sensors. If you immediately load food into a warm chamber, the compressor will work hard, trying to cool a large volume of heat, which will shorten its resource.
After the refrigerator has completed several cycles of turning on and off and has reached the set temperature, you can carefully load the food. Distribute them evenly without blocking the ventilation holes on the back wall.
⚠️ Attention: If, after turning on, the refrigerator makes unusually loud sounds, vibrates or does not freeze for 5-6 hours, immediately turn it off and contact the service center. It is possible that the wiring or control system was damaged during the defrosting process.
Why can’t you turn it on immediately with the food?
Loading warm or room temperature food into a newly defrosted refrigerator creates an extreme load on the compressor. It is forced to work continuously, which can lead to overheating and breakdown.
Frequently asked questions (FAQ)
Is it necessary to defrost the LG No Frost refrigerator if there is no visible ice?
Yes, preventive defrosting is recommended once a year, even if there is no visible ice. This will help clear the drainage, eliminate odors and check the operation of the defrost system, preventing hidden problems.
How long should the refrigerator be left turned off?
The minimum time is 4 hours, the optimal time is 8-12 hours (for example, overnight). The main condition is that all internal surfaces and the drainage channel are completely dry.
Is it possible to use hot water to speed up defrosting?
You cannot use boiling water - there is a risk of damaging the plastic. You can use warm water (about 50-60°C) in containers, but pouring it directly onto the walls or evaporator is prohibited.
What to do if water appears on the floor after defrosting?
Most likely, the drainage is clogged or the water has not had time to evaporate from the compressor pan. Check the cleanliness of the drainage hole in the refrigerator compartment and make sure that the tray under the compressor (bottom back) is intact and correctly installed.
Does frequent defrosting affect the life of the refrigerator?
Regular, but not excessive defrosting (once a year) extends the life of the refrigerator, reducing the load on the compressor. Unnecessarily defrosting too often is not beneficial, but it will not cause much harm if you follow safety rules.