Owners of modern climate control equipment often wonder about the need and correctness of defrosting, especially when it comes to premium models Liebherr with the system BioFresh. Many users mistakenly believe that the presence of technology NoFrost completely eliminates the need to maintain the unit, but this is not entirely true. Even in systems with complete moisture removal, human intervention is periodically required to maintain an ideal microclimate and hygiene.
Incorrect actions when removing ice can lead to damage to expensive sensors, leakage of seals, or malfunction of electronics. In this article we will analyze in detail the algorithm of actions that will allow you to safely carry out the procedure, preserving the freshness of the products and the performance of your Liebherr. You will learn why automation does not always cope 100% and how to extend the life of the compressor.
It is worth immediately noting that the frequency of the procedure directly depends on the operating conditions and humidity in the room. If you notice that ice is forming on the walls of the chambers, and the smell of food has become less fresh, this is a signal to action. Ignoring these symptoms can lead to evaporator a thick layer of ice, which will significantly increase energy consumption.
Why does ice form in refrigerators with NoFrost
Technology NoFrost (or “No frost”) is often perceived by users as an absolute guarantee of the absence of ice, but the physics of the process dictates its own conditions. The system is based on forced circulation of dry cold air, which passes through a hidden evaporator, where moisture is frozen out. However, moisture still gets into the chamber - every time you open the door or put warm food inside.
⚠️ Attention: In conditions of high air humidity in the room (more than 70%) or if the door seal is faulty, the condensate removal system may not cope with the volume of incoming moisture, which leads to the formation of an ice crust.
Key an element that often fails or works incorrectly is Defrost heating element. This heating element is periodically turned on on a timer to melt the frost on the hidden evaporator. If the heating element burns out or the timer “sticks,” ice begins to accumulate inside the housing, gradually blocking the air circulation channels. As a result, the cold ceases to be evenly distributed throughout the chambers BioFresh.
Another reason for freezing may be a clogged drainage hole. The condensate formed during defrosting must flow freely into a special tray above the compressor. If a plug of dirt or mold forms in the drain, the water freezes, forming drifts at the bottom of the chamber or behind the back wall. Regular preventative maintenance helps to avoid costly repairs discharge system.
Preparing for defrosting: step-by-step algorithm
Before starting any manipulations, it is necessary to properly prepare the equipment to minimize risks and preserve food. The first step is to disconnect the refrigerator from the power supply. It is not enough to simply turn off the button on the control panel; you must physically remove the plug from the socket. This will ensure complete safety and stop all compressor operation cycles. On/Off, you must physically remove the plug from the outlet. This will ensure complete safety and stop all compressor cycles.
Next, you need to empty the chambers of their contents. Products should be removed and transferred to another cold place or used insulated containers with ice. Pay special attention to the shelves BioFreshas they are complex structures with a separate ventilation system. It is better to remove them completely to provide access to all corners of the chamber and to avoid accidental damage to the fragile plastic when cleaning.
☑️ Preparing the refrigerator for defrosting
To collect melt water, prepare flat containers and absorbent rags. It is also better to cover the floor around the refrigerator with towels, since water can flow out of the drainage hole not only into the pan, but also outward if the hose is pinched by ice. Prepare a soft rag in advance to wipe the internal surfaces after completing the process.
Natural and accelerated defrosting
There are two main ways to get rid of ice jams: natural and accelerated. Maintenance experts Liebherr strongly recommend using only the natural method. It takes longer (from 10 to 24 hours depending on the amount of ice), but is absolutely safe for internal components, such as aluminum evaporator and plastic tubes.
To speed up the process, you can leave the chamber doors open, providing a draft in the room. Some users try to speed up defrosting by placing bowls of hot water inside. This method is acceptable, but requires caution: the bowl should be placed on a thick towel or wooden board so as not to damage the plastic of the bottom of the chamber due to temperature changes. It is strictly forbidden to pour hot water directly onto walls or ice blocks.
Why can’t you use a hairdryer or knife?
Using a hairdryer creates the risk of local overheating of the plastic, which can lead to its deformation and disruption of the geometry of the air circulation channels. Sharp objects (knives, scrapers) can easily pierce the thin wall of the evaporator, causing the refrigerant to instantly evaporate, making repairs uneconomical.
If you chose the hot water method, change it as it cools. It is important to ensure that the water does not overflow over the edge of the container. After the main body of ice has melted, it is necessary to thoroughly dry all surfaces. The remaining moisture can quickly turn into a new layer of frost the first time you start the compressor.
Cleaning the drainage system and maintaining BioFresh
The fresh food storage area requires special attention. BioFresh. These compartments maintain high humidity to preserve vitamins, but excess moisture should not stagnate. After defrosting, be sure to check the drainage hole, usually located on the back wall of the main chamber. It should be free of debris and mucus.
To clear the drainage, you can use a special flexible brush or soft wire wrapped in cotton wool. Carefully push the tool into the channel to break through any ice or mud plugs. After mechanical cleaning, it is recommended to pour a small amount of warm water into the hole to ensure free flow. If the water stands still, the procedure is repeated until the blockage is eliminated.
| System element | Check frequency | Cleaning method | Risk of ignoring |
|---|---|---|---|
| Drain hole | Each defrosting | Washing with warm water | Puddle on the floor, smell of mold |
| Door seals | Once every 3 months | Wipe soap solution | Tightness violation, ice |
| BioFresh shelves | Once every six months | Wash with warm water | Clogged ventilation holes |
| Rear wall | When ice appears | Natural defrosting | Temperature sensor failure |
Do not forget to wipe the rubber door seals. They often accumulate grease and dirt, which destroy the rubber and prevent a tight fit. To care for rubber, you can use a special silicone spray or just a weak soap solution. Clean seals ensure that warm air will not penetrate inside, causing the growth of ice crystals.
What absolutely should not be done when defrosting
There are a number of actions that can instantly turn routine maintenance into an emergency. The most important rule: never use sharp objects to chip ice. The blade of a knife or the tine of a fork can damage the evaporator tube in which the refrigerantcirculates. Repair in this case will require evacuation of the system, replacement of the compressor and refilling with gas, which is up to 70% of the cost of a new device.
It is also prohibited to use chemical solvents, acetone or aggressive cleaning agents to remove ice or clean plastic. Harsh chemistry can react with the materials in the inner chambers, making the plastic brittle or changing its color. Moreover, chemical vapors can be absorbed into food, making it unfit for consumption.
⚠️ Attention: Do not turn on the refrigerator immediately after defrosting if there is still moisture inside. Allow the cameras to dry completely for 30-60 minutes with the doors open and the power off.
Another common mistake is trying to turn on the device ahead of time. A compressor Liebherr, like any other, needs time for the oil in the system to return to the crankcase after inactivity. If you start the unit right away, you can provoke a water hammer. The minimum waiting time before turning on is 2-3 hours after complete defrosting, although modern instructions sometimes allow shorter intervals, it is better to be on the safe side.
Starting and checking operation after maintenance
After the chambers are washed, dried and assembled, you can start starting. Plug in the refrigerator. On the control panel Liebherr an alarm indicator or a sound signal may light up - this is normal, since the temperature inside the chambers is still high. Let the device run idle (without food) for 2-3 hours so that it reaches the operating temperature.
Check the operation of the system BioFresh. Make sure the duct dampers open and close to allow cool air into the zero zone. If the model is equipped with electronic controls, reset the errors if they come on while not in use. This is usually done by long pressing the reset button or turning off the power for 15 minutes.
On the first day after defrosting, listen to the operation of the unit. Extraneous noises, gurgling or humming may indicate that there are air pockets in the system or ice blockages in the drainage. If after 24 hours frost appears on the walls again and the temperature does not hold, perhaps the problem lies deeper - in a malfunction of the control module or defrost sensor. Is it necessary to defrost a Liebherr refrigerator with the NoFrost system? data-i="131">Yes, even models with NoFrost require periodic defrosting (usually once a year), since moisture still gets inside when the doors are opened and can freeze in hidden cavities, disrupting air circulation. defrost sensor or control module.
Do I need to defrost a Liebherr refrigerator with NoFrost?
Yes, even models with NoFrost require periodic defrosting (usually once a year), since moisture still gets inside when the doors are opened and can freeze in hidden cavities, disrupting air circulation.
How long should defrosting last?
The optimal time for complete defrosting is from 10 to 24 hours. This depends on the thickness of the ice and the room temperature. Rushing the process with artificial heating is dangerous for plastic parts.
What to do if the refrigerator does not freeze after defrosting?
Perhaps the tubes are pinched or the sensors are damaged. Check if the cable is pinched and make sure the drain hole is clear. If the problem persists for more than 5 hours of operation, call a specialist.
Can BioFresh shelves be washed with hot water?
The plastic of BioFresh shelves is durable, but sudden temperature changes can cause microcracks. It is recommended to wash them with water at a temperature not exceeding 40°C, using mild detergents.