Double-chamber refrigerators LG with the system No Frost are advertised as not requiring defrosting - but this is not entirely true. Yes, an ice “coat” forms in them less often than in drip models, but even an advanced ventilation system does not eliminate the need for periodic maintenance. Moisture, condensation and microscopic food particles accumulate over time on the evaporator and in the drainage system, which can lead to an unpleasant odor, increased energy consumption, or even compressor failure.
In this article - unique defrosting recommendations specifically for LG models with No Frost technology, taking into account the features of their design (for example, a hidden evaporator in the freezer and system Multi Air Flow). We will look at how often this needs to be done, what tools to prepare, and why you can’t just “turn it off and forget it.” And also - what to do if, after defrosting, the refrigerator begins to work louder or does not cool.
Why does No Frost still need to be defrosted?
Technology No Frost (translated - “no frost”) implies automatic removal of ice due to a fan and heating element. However, this does not mean that the refrigerator LG is completely free of moisture. Here's what happens inside:
- 🔄 Operation cycle: The fan distributes cold air evenly, but when the door is opened, warm air gets inside, forming condensation on the back wall and the evaporator.
- ❄️ Hidden ice: In the freezer compartment, ice accumulates on hidden evaporator (it is not visible indiscriminately), which over time worsens heat transfer.
- 🦠 Bacteria and odors: Moisture + food residues = ideal environment for mold in the drainage hole and on the seals.
The manufacturer LG recommends defrosting 1–2 times a year (or more often, if the refrigerator is often opened and is in a hot room). Ignoring this procedure can lead to:
- 📈 Increased energy consumption by 15–20% (the compressor runs longer to compensate for poor heat transfer).
- 🔊 Increased noise due to icing fan.
- 🚨 Breakage of temperature sensors or defrost timer (if ice blocks their operation).
⚠️ Attention: If your refrigerator LG models 2018–2023 with the function Smart Diagnosis, after defrosting it may You will need to reset errors through the service menu. Reset instructions are in the section “What to do after defrosting.”
Preparation: what needs to be done BEFORE turning off the refrigerator
Improper preparation is the main cause of problems after defrosting. For example, if you don't remove food in advance, it can spoil due to sudden temperature changes, and condensation from shelves can get into electronics. Here is the checklist:
Place all the food in a cooler bag or thermal container
Take out shelves, drawers and racks (wash them separately!)
Unplug the refrigerator (don't just turn it off with a button!)
Put rags or a tray under the drainage hole
Prepare warm water, a soft sponge and cleaning agent (no abrasives!)-->
Pay special attention:
- 🧊 Freezer compartment: If there is a lot of ice in it, place a towel under it - when thawing, water can flow not only into the drainage, but also onto floor.
- 🔌 Power: Do not just turn off the refrigerator with the button, but physically remove the plug from the socket. In some models LG (for example, GA-B489 or GB-B459), even when turned off, voltage may remain on the control board.
- 🧽 Detergents: Do not use aggressive chemicals (for example,
DomestosorWhiteness) - it can damage the plastic and rubber seals. Optimally: soda solution (2 tablespoons per 1 liter of water) or special products for refrigerators (for example, Topperr 3101).
If your model has a function Vacation Mode (vacation mode), activate it 12 hours before defrosting - this will help distribute the cold evenly and reduce the amount of condensation during defrosting.
Step-by-step instructions: how to defrost an LG No Frost refrigerator
The defrosting process for two-chamber models LG is different from drip refrigerators. The main rule: do not try to speed up the process with a hair dryer or scraper - this can damage the system No Frost. algorithm:
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Defrost (4-8 hours).
After turning off, leave the doors open in models with Linear Cooling (for example, LG Instaview) ice melts faster - in 3-4 hours. In standard No Frost the process can take up to 8 hours. Do not turn on the refrigerator ahead of time: if ice remains on the evaporator, it will block the fan and the motor may burn out..
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Cleaning the drainage system.
Locate the drainage hole at the bottom of the rear wall of the refrigerator. It often becomes clogged with crumbs and mold. Clean it with a cotton swab or a special brush (included with some models). Then rinse the hole with warm water and soda.
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Washing chambers and seals.
Use a soft sponge and a solution of soda/vinegar (1:1). Pay special attention to:
- 🧽 Rubber door seals - they need to be washed on both sides (dirt often accumulates inside).
- 🔄 Ventilation grilles (in models s Multi Air Flow) - dust on them impairs air circulation.
- 🥶 Evaporator in the freezer (if ice is visible, carefully remove it with a plastic spatula).
Wipe all surfaces with a dry cloth and leave the doors open for ventilation. Moisture inside is the main cause of mold and odor after switching on.
| Stage | Time | What happens if you skip |
|---|---|---|
| Defrost | 4–8 hours | Remaining ice will block the fan, the refrigerator will make noise and cool poorly |
| Cleaning the drainage | 10–15 minutes | Water will accumulate under the drawers and appear smell |
| Washing the seals | 20 minutes | The door will not close tightly, ice will form |
| Drying | 1–2 hours | Mold on the walls, corrosion of metal parts |
⚠️ Attention: If after defrosting the refrigerator LG does not turn on, check whether the thermal fuse has tripped (located on the compressor. In models with a display, an error may appear.Er IForEr dH—this means a problem with defrosting the evaporator. In this case, diagnostics by a specialist is required.
Cleaning hidden areas: evaporator and fan
In refrigerators LG No Frost the evaporator is hidden behind the back panel. the freezer compartment, and the fan is behind the plastic box. Cleaning them requires care, but this is where most of the dirt accumulates. Here's how to do it:
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Removing the back panel of the freezer.
In most models (LG GA-B429, GB-B399 etc.), the panel is secured with latches or screws. Carefully remove it by prying it off with a flat-head screwdriver. Under the panel you will see an evaporator (aluminum radiator) and a fan.
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Removing ice from the evaporator.
If the ice is more than 5 mm thick, do not break it off - this can damage the tubes. Place a cloth soaked in warm water on the evaporator and wait 10-15 minutes. The ice should thaw on its own.
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Cleaning the fan.
Fan blades are often covered with dust and grease. Wipe them with a cotton swab dipped in alcohol. Do not use water —it can get on the engine.
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Checking the heating element.
Under the evaporator there is a defrost heating element (thin spiral). Make sure it is not damaged or rusty. If the heating element does not work, the refrigerator will not defrost automatically.
- 💧 Moisture has evaporated from the seals and walls.
- 🔋 The pressure in the system has been stabilized (especially important for models with an inverter compressor).
- 📡 Temporary errors have been reset (if there were any).
After cleaning, reassemble the panel in the reverse order. Make sure that all the latches are in place - otherwise cold air will escape out.
What to do if the panel cannot be removed?
If the back panel of the freezer does not budge, check:
1) There are no hidden screws under stickers or rubber plugs.
2) Is it blocked by ice? data-i="169">If you are not sure, don’t risk it, contact the service center.
3) Available on some models LG (For example, LRMVC2306S) the panel is attached with magnets - pull it towards you with force.
If you are not sure, do not take risks, contact the service center.
What to do after defrosting: turning on and setting
Do not turn on the refrigerator immediately after washing - let it stand with the doors open for at least 30-40 minutes. This is necessary to:
When you turn it on for the first time:
- Connect the refrigerator to the network and set the temperature:
- Refrigerator compartment:
+4°C(optimal for storing most products). - Freezer compartment:
-18°C(if you need to quickly freeze food, temporarily set-24°C).
- Refrigerator compartment:
Super Cooling (if available) for 2-3 hours - this will help you quickly reach the desired temperature.If the refrigerator makes unusual sounds (grinding, knocking, too loud hum), turn it off and check:
- 🔄 Is the fan touching ice or wires.
- 🧊 Is there any water left in the pan under the compressor (this can cause vibration).
- 🔌 Is the temperature sensor connected correctly (in models with Smart ThinQ a sensor error can lead to constant operation of the compressor).
Common mistakes and how to avoid them
Even experienced users sometimes make mistakes when defrosting, which lead to breakdowns. Here are the top 5 problems and their solutions:
| Error | Consequences | How to fix |
|---|---|---|
| Using sharp objects to remove ice | Damage to the evaporator, freon leakage | Thaw ice only with warm water or a hairdryer at minimum power |
| Turning on the refrigerator immediately after washing | Short circuit, corrosion of contacts | Let it stand for 1-2 hours with the doors open |
| Ignoring cleaning the drainage hole | Water stagnation, unpleasant odor, mold | Clean the hole with a cotton swab or brush once every 3 months |
| Washing seals with abrasive agents | Microcracks, loss of elasticity, poor fit doors | Use only soft sponges and soda/vinegar solution |
| Incorrect assembly of the rear panel of the freezer | Evaporator freezing, increased noise | Check that all latches and screws are in place place |
Pay special attention to models with the function DoorCooling+ (for example, LG GC-B247). They have an additional evaporator installed in the door, which also needs to be dried after defrosting. If you leave it wet, a smell will appear after 1-2 weeks.
⚠️ Attention: If after defrosting the refrigerator LG shows an errorEr FForEr CF, this indicates a problem with the fan or sensor. Do not try to reset the error by turning it on/off repeatedly - this can burn the control board. Contact your service provider. service.
How often to defrost an LG No Frost refrigerator?
The frequency of defrosting depends on several factors:
- 📅 Standard schedule: 1-2 times a year (spring and autumn).
- 🌡️ Room temperature: If the refrigerator is located next to the stove or on the sunny side, defrost every 4-5 months.
- 🚪 Opening frequency doors: In families with children or during active use - once every 3-4 months.
- 🍖 Type of products: If you often store liquid dishes (soups, sauces) without lids, the humidity inside increases - more frequent cleaning is required.
Signs that defrosting is needed urgently:
- 🔊 Refrigerator began to work louder (the fan touches the ice).
- ❄️ A “fur coat” more than 3-5 mm thick appeared in the freezer.
- 🤢 A persistent unpleasant odor appeared that is not removed by absorbers.
- ⚡ Electricity bill has grown for no apparent reason.
In models with a system Smart Diagnosis (for example, LG LRMVC2306S), you can check the condition of the refrigerator through the mobile application. If a warning appears in the diagnostics Check Defrost System, this is a signal for urgent defrosting.
FAQ: Frequently asked questions about defrosting LG No Frost
Is it possible to defrost an LG No Frost refrigerator with a hair dryer?
It is possible, but only on minimum power and no closer than 20 cm from surfaces. deform the plastic or damage the seals. It is better to use warm water in bowls - it is safer and more effective.
Why does the refrigerator not freeze after defrosting?
There may be reasons different:
- 🔌 The freezing mode is not turned on (check the settings).
- ❄️ The evaporator is clogged with ice (needs to be defrosted again).
- 🛠️ The compressor or temperature sensor is burned out (required diagnostics).
First, check whether the fan is working (cold air should blow when the door is open). If not, call a technician.
How long does it take for an LG refrigerator to defrost?
Depends on the model and amount of ice:
- 🕒 Linear Cooling (for example, LG Instaview): 3–5 hours.
- 🕓 Standard No Frost: 6–8 hours.
- 🕔 If the ice is more than 1 cm thick: up to 12 hours.
You can speed up the process by placing bowls of warm water in the chambers (change them every 30 minutes).
Do you need to defrost a new LG refrigerator after purchase?
Yes, but not right away. First, let it stand 2-3 hours in the off state (so that oil in the compressor glass down). Then turn on for 1-2 hours, and then defrost and wash. This will remove factory odors and dust.
Is it possible to defrost an LG refrigerator without unplugging it?
No! voltage remains on some boards. This is life-threatening and can lead to a short circuit if water gets in. Always unplug the plug from the socket!