The situation when ice suddenly stops forming in the freezer compartment of a refrigerator, and food begins to spoil, causes panic in any home cook. The technology LG Ice suddenly stops forming and food begins to spoil, causing panic in any home cook. Technology No Frost (without frost) is designed to relieve the user from the need for regular manual defrosting, but when the system fails, it becomes immediately noticeable. Often, owners do not notice the problem right away: at first the chamber becomes simply cool, not cold, then the characteristic hum of the operating compressor disappears or, conversely, it starts working without stopping.
In most cases, the reason lies not in a complete breakdown of the unit, but in the failure of one of the auxiliary elements of the cooling system. This could be a clogged capillary tube, a malfunction of the defrost sensor, or a simple lack of refrigerant. It is important to understand that LG refrigerator is a complex mechanism where all the nodes are interconnected. Before calling a technician, it is worth carrying out an initial diagnosis to understand the scale of the problem and the approximate cost of future repairs.
You should not ignore the first signs of a malfunction. If you notice that a “coat” of ice has appeared on the back wall, although the model is declared as No Frost, or the temperature in the main chamber has risen above 10 degrees while the engine is running, you need to act. In this article, we will analyze in detail the main components that most often fail, and explain how to check their performance at home without complex equipment.
Checking the operating mode and tightness of the chambers
Before you climb inside the equipment with tools, make sure that the problem is really technical and not operational. Often, users accidentally activate the mode Super Freeze (super freezing) or, conversely, set the minimum cooling power. Check the control panel on the door: the indicators should light normally. If the alarm light is on or the temperature light is blinking, this is the first bell.
The second critical point is tightness. The system No Frost is sensitive to the ingress of warm, humid air from outside. If the rubber seal on the door is worn out, torn or simply dirty, moisture constantly enters inside. It settles on the evaporator, freezes and turns into an icy monolith that blocks the circulation of cold air. As a result, the fan circulates air, but it does not enter the main chamber.
⚠️ Attention! If the sealing rubber has deep cracks or creases, restoring its tightness using traditional methods (hair dryer, boiling water) will only be possible temporarily. For reliable operation, a complete replacement of the seal is required.
Also check whether the water drainage channels are frozen. If the drainage hole is clogged with crumbs or ice, the condensation does not go away, but freezes inside the case, gradually turning into a block of ice, which can block the operation of the dampers or fan.
- 🔍 Check the tightness of the door around the entire perimeter using a sheet of paper.
- 🌡️ Make sure that the set temperature conditions correspond to the current load products.
- 🚪 Inspect the door hinges: the structure itself may be skewed and the door does not close all the way.
- 🧊 Look in the freezer: if there is a lot of ice in only one corner, most likely the problem is in air circulation.
Defrost System malfunctions
The most common reason why it stopped freezing LG with the No Frost function lies in the evaporator defrost system. During normal operation, frost from the moisture of the food freezes on the evaporator (located behind the rear wall). Periodically, according to a timer, the heating element (Heating element) is turned on, which melts this frost, and the water flows into the drain. If this cycle is disrupted, the evaporator becomes covered with ice “in stone”, and the cold stops flowing into the chambers.
A chain of sensors is responsible for the defrosting process. The main one is defrost sensor (thermostat), which is located on the evaporator. If he “lies” and shows that there is no ice (although there is), the heating element will not turn on. Also important is the defrost timer or electronic control module, which issues the command to start heating. In models LG there is often a failure of the defrost heating element itself: the coil simply burns out like a light bulb.
Diagnostics requires disassembling the freezer. You need to remove the back panel, get to the evaporator and visually assess the amount of ice. If there is an “iceberg” and the food is not frozen, the problem is definitely in the defrosting. Next, the heating element and resistance sensors are “ringed” with a multimeter. An open circuit will indicate a faulty element.
How to check the heating element with a multimeter?
Switch the multimeter to resistance measurement mode (Ohm). Disconnect the wires from the heating element and touch the probes to its contacts. If the device shows “1” or “OL” (infinity), the heating element has burned out. If it shows a value in the range of 200-500 Ohms, it is working.
Problems with the fan and air circulation
In refrigerators No Frost the cold does not spread along the bottom, but is forced by the fan. This unit is located in the freezer, usually behind a plastic panel. If the fan stops rotating, cold air remains in the freezer (and not always), and it simply does not reach the refrigerator compartment. As a result, it is warm in the main chamber, and the temperature in the freezer may be normal or warming may also begin.
A common reason for the fan stopping is its freezing. If the defrost system is not working correctly (see previous section), ice may form on the fan blades or the fan motor itself. In this case, you may hear the hum of the motor, but there will be no rotation, or extraneous noise or crackling. Sometimes the reason is more banal: a piece of ice, packaging film or other debris could get into the blades.
The second reason is an electrical malfunction of the fan motor itself. Over time, the bearings wear out, play appears, and the motor jams. You can check it by trying to twist the blade by hand (with the refrigerator unplugged). If it spins slowly or makes noise, the bearings are dry. If it is easy, but the motor does not start when power is applied, the winding has burned out.
- 🌀 Remove the plastic cover in the freezer to gain access to the fan.
- 🧊 Remove all excess ice around the blades and motor housing.
- 🔌 Check for voltage at fan terminals when the refrigerator is on.
- 👂 Listen: a characteristic hum without rotation indicates jamming.
Faults in the compressor and start relay
The compressor is the “heart” of the refrigerator. If it doesn't start, there will be no cooling anywhere. Modern models LG often use inverter compressors, which are quieter and more economical than conventional ones. However, their diagnosis is more difficult. If you hear that the motor is trying to start, humming, clicking, but after a few seconds it turns off, the problem is most likely in start relay or in the compressor itself.
The start relay is a small plastic block that fits onto the contacts of the compressor. Inside there is a coil and contacts that must close the circuit to start. Over time, the plastic becomes brittle, the contacts burn out, and the relay ceases to perform its function. This is one of the most common and inexpensive breakdowns. Replacing the relay takes 15 minutes and does not require special tools.
A more serious situation is a compressor “wedge” or an interturn short circuit of the windings. If, when you try to start, the compressor hums, gets very hot and knocks out the circuit breaker in the panel (or protection relay), then it is probably jammed. In inverter models LG an electronic control unit located at the bottom rear is responsible for starting. If it “died”, the compressor will not receive a start command, even if it is in good working order.
Freon leakage and clogged capillary system
If the compressor runs continuously without turning off, it hums, but there is no cold at all or it is very weak, and the condenser (grid at the back) remains barely warm or cold, there is a high probability leakage refrigerant (freon). Freon is a gas that circulates through the system, transferring heat. If a microcrack appears in the circuit (often due to corrosion or vibration), the gas escapes and cooling stops.
Another problem with similar symptoms is clogged capillary tube. Oil circulates in the system, which over time can oxidize or mix with breakdown products, forming a plug. Most often, a blockage occurs at the entrance to the evaporator, where the tube is thinnest. Freon cannot pass through the plug, the pressure drops, and the refrigerator stops freezing.
It is extremely difficult to diagnose these faults at home. Visually, you can notice swelling of the refrigerator wall (sealing area) or oily stains at the bottom of the case. To accurately determine the location of a leak or blockage, a pressure gauge station and the experience of a technician are required. It is impossible to fix a leak or break through a blockage on your own without equipment.
| Symptom | Probable cause | Difficulty of repair | Need a technician |
|---|---|---|---|
| The compressor does not starts, silence | Faulty starting relay or control module | Low | You can do it yourself |
| Works without stopping, no cold | Freon leak or system blockage | High | Required |
| There is ice in the freezer, there is heat in the chamber | Malfunction of the defrost system (heating element, sensor) | Average | You can do it yourself |
| Noise, crackling, no airflow | Fan malfunction | Low | You can yourself |
Electronic control module and sensors
Modern refrigerators LG are stuffed with electronics. The main one is responsible for distributing cold, starting defrost and operating the compressor. If moisture gets on the board (for example, when washing the floor around the refrigerator or a drainage leak), the contacts may oxidize or the traces may burn out. In this case, the refrigerator may behave chaotically: sometimes it freezes, sometimes it doesn’t, or it doesn’t respond to buttons. electronic module. If moisture gets on the board (for example, when washing the floor around the refrigerator or a drainage leak), the contacts may oxidize or the traces may burn out. In this case, the refrigerator may behave chaotically: sometimes it freezes, sometimes it doesn’t, or it doesn’t respond to the buttons.
In addition to the main unit, temperature sensors (thermistors) play an important role. They are in the refrigerator, freezer and on the evaporator. If the sensor “lies” (for example, it shows -5°C, when in fact it is +10°C), the control module “thinks” that the cold is sufficient and does not turn on the compressor. Replacing sensors is a simple procedure, but it requires knowledge of where exactly they are located in your model.
⚠️ Attention! Before replacing any electronic components or sensors, be sure to unplug the refrigerator for at least 15-20 minutes. This is necessary to reset errors in the control module memory and prevent short circuits.
Sometimes the problem is solved by simply rebooting the “brains” of the refrigerator. If the device is frozen, disconnecting from the network for a long time (30-40 minutes) can bring it back to life. If after switching on the error repeats, it means that the part has really failed.
☑️ Do-it-yourself primary diagnostics
Frequently asked questions and answers (FAQ)
Why does the LG No Frost refrigerator only freeze at the top?
This is a classic sign of a malfunction in the air circulation system. Most likely, the air supply channel from the freezer to the refrigerator compartment is frozen, or the damper that regulates the flow is not working. Also, the reason may be that the blower fan has stopped.
How long does it take to defrost an LG refrigerator after a breakdown?
If the evaporator is completely frozen due to a failure of the defrosting system, the refrigerator should stand turned off with the doors open for at least 24 hours (preferably 24 hours). The ice inside the case melts slowly, and if you turn on the unit too soon, the water can damage the electronics or freeze again, exacerbating the problem.
Is it possible to replace the defrost heating element yourself?
Yes, if you have basic skills with tools and a multimeter. You will need to remove the back panel in the freezer, unscrew the heating element (usually 2-4 bolts) and disconnect the terminals. The main thing is to buy an original spare part or a high-quality analogue with exactly the same power parameters.
What does the flashing temperature indicator on the LG door mean?
A flashing indicator indicates that the temperature in the chamber is above the established norm. This can happen either immediately after turning on an empty refrigerator, or during a malfunction. If after 5-6 hours of operation the blinking does not stop and the cold does not appear, diagnostics are required.