How to properly defrost an LG refrigerator: a complete guide

Modern refrigerators LG famous for their reliability and advanced cooling systems, such as Total No Frost or Smart Inverter. Despite the advertising assurances of manufacturers that equipment with a “frost-free” system does not need to be defrosted, actual operation makes its own adjustments. Over time, dust, grease and bacteria accumulate in the drainage channels, which turn into a dense ice plug that blocks the outflow of water.

It may seem to you that the unit is working properly until a puddle appears at the bottom of the chamber or the back wall is covered with a thick crust of ice. It is at this moment that the question arises about the need for complete defrosting. This process requires not only turning off the device from the network, but also observing a number of technical nuances so as not to damage compressor or the condensate drainage system.

In this article we will analyze in detail the physics of the process of ice formation in different types of refrigerators of the Korean brand. You will learn why automatic defrosting sometimes fails and how to carry out the cleaning procedure as efficiently and safely as possible for your equipment.

Why ice forms in No Frost and Drop Frost systems

Many users mistakenly believe that the presence of marking No Frost completely eliminates the appearance of ice inside the chamber. In fact, this technology only transfers the freezing process of moisture to a hidden evaporator compartment located behind the rear panel. The air circulates through special channels, cooling the food, but the moisture from the food does not disappear anywhere - it settles on the cold evaporator.

Periodically Defrost heating element it turns on the timer and melts this ice, the water flows into the tray and evaporates. However, if the door is used frequently or the seal is worn out, the amount of moisture increases sharply. The system does not have time to remove water, and it begins to flow inside the chamber or freeze in hard-to-reach places. In models with drip system (Direct Cool), moisture simply flows down the back wall into a groove, which can also become clogged.

The quality of ventilation becomes a critical factor. If food is placed close to the back wall, it blocks the air circulation holes. This disrupts thermoregulation and leads to local hypothermia of the nodes, where it begins to increase. ice coat. Ignoring this symptom leads to increased energy consumption and wear on the compressor.

⚠️ Attention: If you notice that the refrigerator has started to operate louder than usual or the power cycles have become more frequent, this may indicate that ice is interfering with the operation of the fan or temperature sensors.

It is also worth considering that over time the drainage hole becomes overgrown with “biofilm” - a mixture of mold and fat. This substance narrows the channel, and even the normal volume of melt water does not have time to leave, causing the groove to overflow and water flowing out.

Preparing for defrosting: what needs to be done before turning it off

Before pulling the cord from the outlet, it is necessary to carry out a number of preparatory manipulations. This will preserve food and protect the flooring in the kitchen. The first step is to empty the refrigerator and freezer compartments of their contents. If defrosting is planned, it is better to plan the menu in advance in order to use supplies.

For temporary storage of food, use thermal bags, ice packs or, in winter, a balcony (subject to negative temperatures). It is important not to leave food at room temperature for long periods of time, especially meat and dairy products. While you are sorting supplies, the refrigerator will continue to work, maintaining the cold.

Next you need to remove all removable elements: shelves, drawers, egg trays, bottle holders. Glass and plastic can crack if there is a sudden change in temperature (if you decide to wash them with hot water), so it is better to let them warm up to room temperature separately. Plastic parts become brittle in the freezer, so you need to remove them carefully and without using excessive force.

Don't forget to prepare absorbent materials. Even if you plan to collect water with a rag, it is better to spread old towels or rags under the bottom of the refrigerator and around it. Water can flow under the baseboard or into hard-to-reach places under the body, which can lead to an unpleasant odor or damage to the laminate.

Step-by-step instructions: how to properly turn off and defrost

The most important step is the correct shutdown. Don't just pull the plug if the compressor is running at full capacity. Let the equipment rest for a couple of minutes after the last time you turned it on, then unplug it. If the model is equipped with electronic control, wait until the indicators on the display go out.

Now we leave the doors open. Natural defrosting takes from 3 to 24 hours depending on the amount of ice and the room temperature. You can speed up the process with a hairdryer or hot water, but with extreme caution, as will be discussed below. The main task is to allow the ice to melt and water to flow into the drainage system or onto the floor (which we laid).

During the melting process, it is important to periodically check the pan located under the evaporator (if accessible) or at the bottom of the case. The water from there evaporates on its own, but if there was a lot of ice, the pan may overflow. In such cases, it is better to carefully remove excess water with a syringe or syringe so that it does not spill over the edge onto the floor.

⚠️ Attention: It is strictly forbidden to use sharp objects (knives, screwdrivers, scrapers) to chip ice. One awkward movement can damage the freon tubes, which will lead to expensive repairs and refilling with refrigerant.

While the equipment is turned off, it’s time to inspect the rubber seals. Wipe them with a mild soap solution and check for cracks. If the rubber has become rough, you can lubricate it with a special silicone grease or glycerin to restore elasticity.

Cleaning the drainage system and removing odors

After the main ice has melted, it is often discovered that water stands in the groove on the back wall and does not go away. This means the drain hole is clogged. To clean it, you can use a special flexible brush, which is often included, or a regular soft bottle brush.

If there is no brush, a medical syringe without a needle or a rubber bulb will do. Take warm (not boiling water!) water and inject it into the hole under pressure. Repeat the procedure until water begins to flow freely into the housing. For disinfection, you can use a soda solution or a weak chlorine-containing agent, but be sure to rinse thoroughly with clean water afterwards.

Removing odors is another important step. While the chambers are empty and dry, wipe all surfaces with a solution of baking soda (2 tablespoons per liter of water) or a special refrigerator cleaner. Avoid aggressive chemicals with strong aromas, as plastic absorbs odors well, and then they can transfer to food.

Pay special attention to the fan in the freezer (if it is available and accessible after removing the panel). Sometimes ice builds up on the blades, which interferes with rotation. It must be carefully removed to restore normal air circulation after switching on.

Critical point: before assembly, make sure that all surfaces are absolutely dry, especially the area around the drainage hole, so that water does not freeze there immediately after the first cycle of operation.

Is it possible to speed up the defrosting process

The question of speeding up defrosting is often raised disputes. On the one hand, the natural process is the safest. On the other hand, waiting a day is not always possible. Using a hairdryer is permissible, but only in cold or barely warm air mode, and at a distance of at least 30-40 cm from plastic and rubber bands.

Hot air can deform the thin plastic of shelves or internal lining, as well as damage seals. Direct the air stream strictly at the ice blocks, avoiding contact with electronic components, sensors and wiring. It’s better to spend more time, but not risk the integrity of the case.

Why can’t you pour boiling water?

You cannot pour boiling water directly onto ice or the walls of the refrigerator. Sudden temperature changes can cause cracks in the plastic or even damage the metal circuit of the evaporator if it is located close to the wall. In addition, a large volume of hot water will create an excessive load on the drainage, which may not be able to cope with the flow.

Some users install hot water containers inside the chambers. This method is more effective than a hair dryer, as heat is transferred through steam and air. Bowls with boiling water are placed on towels (so as not to break the glass of the shelf) and the door is closed. The steam settles on the ice and speeds up the melting. You will have to change the water every 15-20 minutes.

The compressor must stand off for at least 2-3 hours (preferably 4-5) so that the oil that could migrate into the system during transportation or tilting flows back into the crankcase. Switching on “hot” or with residual moisture on the contacts can lead to a short circuit.

Completion of the procedure and first start-up

When all surfaces are dry and the drainage is checked, we proceed to assembly. Wipe the shelves and drawers dry and put them back in place. Make sure that nothing interferes with the free movement of drawers and the closing of doors. Now you can plug in the refrigerator.

It is better to start the first time without food. Let the equipment run idle for 1-2 hours until it reaches operating temperature. At this time, listen to the operation of the compressor: there should be no knocking, vibration or humming that is different from normal.

After the refrigerator reaches the temperature (the indicator goes out or lights up green), you can gradually load the food. You should not fill the chambers completely at once - this will create a large thermal load. Arrange the food evenly, leaving gaps for air circulation.

Common mistakes and preventive measures

One of the main mistakes is ignoring the regularity of maintenance. Even if there is no visible ice, preventive cleaning and drainage checks should be carried out every 6-12 months. This will extend the life of the unit and maintain the hygiene of stored products.

Another mistake is loading warm products. If you place a hot pan in the chamber, the system No Frost may not be able to cope with the sudden release of steam. The moisture will instantly turn into frost on the evaporator, and the defrosting cycle may not have time to melt such a mass, which will lead to icing.

Also, users often forget to check the installation level of the refrigerator. If it is tilted forward, the water from the gutter will not flow by gravity into the drain, but will overflow onto the floor. The refrigerator should be slightly tilted back so that the door closes itself when it is released.

Following these simple operating rules will allow your LG to serve for many years without the need to call a technician. Remember that proper defrosting is not just removing ice, it is a comprehensive maintenance of the cooling system.

Is it necessary to defrost an LG refrigerator with the Total No Frost system?

Yes, it is necessary. The No Frost system prevents ice from forming on food and chamber walls, but ice builds up on the hidden evaporator. Although there is automatic defrosting, once every year or two it is necessary to carry out a complete defrosting for hygienic cleaning and clearing the drainage channels from blockages that the automation cannot remove.

How long can you not turn on the refrigerator after defrosting?

It is recommended to wait at least 2-3 hours after you have wiped all surfaces dry. This time is necessary for the compressor oil, which could move into the cooling circuit, to flow back into the compressor crankcase. Turning on earlier than this period can lead to water hammer and damage to the motor.

What to do if after defrosting the refrigerator does not freeze?

If after turning on and passing 4-5 hours of operation the temperature does not drop, there may be an electronics failure or damage to the system during cleaning. Try doing a full reset (unplug for 15 minutes). If this does not help, a technician needs to diagnose it; perhaps the freon has evaporated due to careless chipping of the ice.

Can you wash the refrigerator with dishwashing detergent?

You can use regular dishwashing detergent, but rinse it off very carefully. It is better to use special refrigerator sprays or a baking soda solution. Chemical fragrances and surfactants can be absorbed into plastic and change the taste of products, as well as cause allergies.