The situation when a puddle suddenly forms under the refrigerator or inside the chamber always takes you by surprise. Owners of equipment LG with the system No Frost are often surprised by this, as they expected a complete absence of moisture. However, even advanced defrosting systems can malfunction, and water begins to accumulate where it should not be. This does not always mean a breakdown, but the problem cannot be ignored.
Water may appear due to a simple blockage or a serious violation of the defrost cycle. It is important to quickly identify the source of the leak to prevent damage to the flooring or food. In this article, we will analyze in detail the mechanics of the system, typical malfunctions and how to fix them yourself.
⚠️ Attention: Before starting any diagnostic or repair work, be sure to disconnect the refrigerator from the power supply. Working with electrical appliances in humid conditions requires strict adherence to safety precautions.
The principle of operation of the moisture removal system in No Frost
The system No Frost (translated as “no frost”) is more complex than a drip defrosting system. In such models LG moisture from the air of the food evaporates and settles on the evaporator, which is located behind the back wall of the freezer. Unlike old models, where ice accumulated on the walls of the chamber, here it forms hidden.
Periodically, by a signal from a timer or electronics, it turns on Defrost heating element. It heats the evaporator, turning the ice into water. This water flows down the gutter into the drainage hole and through the tube enters a special tray located above the compressor. There it evaporates naturally. If this well-functioning mechanism is disrupted, the water seeks a way out.
The key elements here are:
- 💧 Evaporator - the place where moisture freezes from the air.
- 🔥 Defrosting heating element - heating element that melts the ice.
- 🚰 Drainage system - a gutter and a tube for draining melt water.
- 📦 Evaporation tray - a container above the motor where water turns into steam.
Understanding this cycle helps to logically calculate at what stage it occurred failure. If there is water inside the chamber, there is a drainage problem. If there is water under the refrigerator, the tray may be overfilled or the tube is cracked.
Clogged drainage hole: the most common reason
The most likely reason why the refrigerator is leaking LGlies in a banal blockage. The drainage hole through which water goes into the tray has a very small diameter. Over time, food particles, crumbs, mold, or even insects get there. A plug is formed that prevents the water from leaving.
Water begins to accumulate at the bottom of the freezer or in the gutter under the evaporator. When its level rises above the sides, it overflows and flows out, often through the door seal or vents. This is a classic situation when the system is working, but “clogged.”
For cleaning you will need:
- 🧹 A flexible brush or soft wire (not sharp!).
- 💉 A syringe or bulb with warm water.
- 🧼 Soda solution or a special product for cleaning drainage.
The cleaning process requires care. Do not pierce the hole with a knife or sharp objects, as this can damage the tube, which is located deep inside the housing. It is better to use a soft wire with a bent end or a special flexible cable.
☑️ Algorithm for cleaning the drainage
⚠️ Attention: If after cleaning the water leaves slowly, the plug may have formed deeper in the tube. In this case, blow out the tube using a bulb or syringe with high water pressure.
Displacement or skew of the water collection tray
Another common, but often overlooked problem is the physical displacement of the condensate collection tray. This plastic piece is located above the compressor at the bottom of the refrigerator. During operation, vibration or careless cleaning of the floor, the tray may move to the side.
If the tray is moved, water from the drainage tube stops flowing into it and pours directly onto the floor or parts of the refrigerator. This can be easily checked by looking under the refrigerator at the back. Often it is enough to simply adjust the tray by hand to solve the problem.
It is also worth checking the integrity of the tray itself. Plastic becomes brittle over time due to temperature changes and may crack. In this case, water will flow out through the crack. Replacing the tray is a simple procedure, but it requires selecting an original spare part or an exact analogue for your model LG.
The main signs of a problem with the tray:
- 💧 Water drips strictly in one place at the bottom back.
- 📉 The tray is visually skewed or shifted to the side.
- 🔊 A strange sound of dripping water appeared when the compressor was operating.
Faults in the defrost system: heating element, sensor, timer
If the drainage is clean and the tray is level, but water still appears, the problem may lie in the electronics or heating elements. The system No Frost is controlled by algorithms. If Defrost heating element it burns out or does not turn on, the ice on the evaporator does not melt. It grows, turning into a huge lump (“shuga”). When this lump becomes too large, it blocks the ventilation channels, and during rare cycles of partial thawing, water begins to drip into the chamber.
The culprit may also be defrost sensor (defrost thermostat). If he “lies” and tells the controller that the temperature is already high, the heating element will not turn on in time. Or, on the contrary, it will not turn off, which will lead to overheating and melting of the entire contents. In models LG the defrost timer (or electronic control module) often fails, which simply does not give the command to start defrosting.
Diagnostics of these elements requires a multimeter. It is necessary to “ring” the heating element for resistance. If the device shows a break (infinity), the element has burned out. The sensors are checked for compliance with temperature resistance.
Symptoms of a defrost system failure:
- ❄️ In the freezer, a large lump of snow or ice is visible on the back wall.
- 📉 The products in the refrigerator compartment have become worse cooled.
- 🔊 The compressor runs longer than usual or hums continuously.
How to check the heating element without disassembling the entire refrigerator?
To accurately check the heating element, partial disassembly of the rear wall of the freezer is often required. However, primary diagnostics can be carried out by measuring the current in the power supply circuit of the heating element during the defrost cycle (if there is access to the terminals). But the most reliable thing is a visual inspection and testing after dismantling the evaporator.
Comparison of the causes of leaks: diagnostic table
To make it easier for you to navigate, we have summarized the main symptoms and causes in one table. This will help you quickly understand where to move next.
| Symptom | Probable cause | Difficulty of repair | Required tools |
|---|---|---|---|
| Water inside at the bottom of the chamber | Drain hole clogged | Low | Brush, syringe, warm water |
| Puddle under the refrigerator at the back | Tray is displaced or cracked | Low | Flashlight, possibly a new tray |
| Ice on the back wall + water | Faulty heating element or sensor | Medium/High | Multimeter, screwdrivers, hair dryer |
| Water flows from the vents | Icing of air ducts | Average | Vacuum cleaner, hair dryer, defrosting time |
As can be seen from the table, most problems can be solved at home. However, if we are talking about replacing electronic components or heating elements, care and skills in working with electricians are required.
Damage to the seal and loss of tightness
Although it sounds counterintuitive, a leak may not be caused by excess water inside, but by moisture from outside. If door seal (the rubber band) is worn out, dirty or the door is warped, warm, moist air from the room constantly enters the chamber. The system No Frost cannot cope with such a volume of moisture; it settles on the products and walls, turning into condensation, which flows down.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter. If it pulls out too easily or with jerks in different places, the tightness is broken. Also inspect the rubber for cracks, tears or mold, which makes it hard.
The solution may be:
- 🧼 Thorough washing of the seal with soapy water.
- 🌡️ Warming up the rubber with a hairdryer (if it has become deformed from cold).
- 🔧 Adjusting the door hinges (if it is skewed).
- 🔄 Complete replacement of the seal when it is worn out.
Sometimes the reason is trivial: you put a hot pan in the refrigerator. The steam instantly condenses and turns into water, which the drainage does not have time to remove. Always cool food to room temperature before storing it.
⚠️ Attention: Do not try to force the frozen seal off - you may tear it. Use warm water or a hair dryer at minimum power to carefully separate the rubber from the body.
Frequently asked questions and answers (FAQ)
Can I use the refrigerator if it leaks a little?
Short term - yes, if you have time to wipe up the water. However, prolonged neglect will lead to swelling of the laminate or parquet flooring, the appearance of mold under the baseboards and corrosion of the metal parts of the refrigerator itself. It is better to eliminate the cause immediately.
Why does water appear only at night or when I am not at home?
This may be due to the defrost cycle, which is often programmed for the night, when the refrigerator is less often opened. Also, at night, the voltage in the network may drop, which affects the operation of the electronics, or the effect of frequently opening the door during the day simply accumulates.
What is the best way to clean the drain tube?
The best option is a soft cable channel from the wires (it is flexible and does not scratch) or a special brush. It is strictly forbidden to use sharp wire, a knife or a knitting needle - there is a high risk of puncturing a thin plastic tube inside the case, which will require complex repairs.
How long does it take to defrost the refrigerator to remove the ice plug?
To completely thaw the “sludge” inside the system, which is not visible to the eye, the refrigerator should stand turned off with the doors open for a minimum 24 hours. Regular defrosting for 2-3 hours is often not enough to melt the ice deep in the air ducts.