Owners of German equipment Liebherr
often faced with the need scheduled maintenance, even if the indicator on the panel is on NoFrost. Contrary to popular belief, automatic defrosting systems do not eliminate the need for the user to periodically defrost the unit completely. This is required to remove old ice that could have formed in hard-to-reach places, and to carry out high-quality sanitary treatment internal surfaces.The process of defrosting the freezer Liebherr is fundamentally different from defrosting old Soviet models or budget analogues with a drip system. Here it is critical to follow the sequence of actions so as not to damage sensitive electronics or break the tightness of the seals. Incorrect actions can lead to compressor failure or the control system to stop reading temperature sensors correctly.
In this article we will analyze in detail the algorithm of actions that will allow you to safely carry out the procedure, clean the drainage channels and prepare the equipment for further operation. You will learn why you can’t use a hairdryer, how to properly place food after turning it on, and what mistakes owners most often make when servicing modern refrigeration units.
Preparing equipment and products for the procedure
The first step is to free up the internal volume of the freezer. If you plan to store frozen food, you will need to prepare insulated containers, cooler bags, or find space in another freezer in advance. Products should be removed quickly to minimize the loss of cold, and immediately close them in thermal packaging.
In parallel with the extraction of supplies, it is necessary to prepare equipment for collecting water. Although modern Liebherr models are equipped with effective moisture removal systems, when completely defrosted, there can be significantly more water than provided by the standard pan. You will need:
- 🧽 Absorbent microfiber or cotton rags to collect moisture from the shelves.
- 🪣 Wide basin or flat tray for installation under the drainage area.
- 🧴 Mild detergent without abrasive particles for the final processing.
- 🌡️ Thermometer for monitoring the temperature inside the chamber before loading products.
It is important to empty not only the shelves, but also remove all removable elements: drawers EasyFreeze, ice trays and glass partitions. It is better to wash them separately in warm water using a detergent. This will allow you to clean hard-to-reach corners of the chamber where condensation usually gets trapped.
Turning off the power and activating the defrost mode
The most critical stage is the correct shutdown of the device. For Liebherr electronically controlled models, simply unplugging the cord may not be enough if you want to save settings or activate a special service mode. On some models with the Electronically controlled Liebherr, simply unplugging the cord may not be enough if you want to save settings or activate a special service mode. On some models with interface SmartDevice or HomeConnect interface, it is recommended to first perform a soft shutdown through the control panel.
Press and hold the on/off button (usually indicated by a On/Offsymbol) for 3-5 seconds until the display goes dark. Only after this, making sure that the screen does not respond to touches, can you disconnect the power cable from the electrical network. This action will de-energize the compressor fans, starting the natural process of heating the evaporator.
⚠️ Attention: It is strictly forbidden to use sharp metal objects (knives, screwdrivers, scrapers) to chip ice! Plastic air ducts and the evaporator in refrigerators Liebherr are located very close to the inner wall. One wrong move can puncture the refrigerant circuit, leading to costly repairs and loss of warranty.
If your model is equipped with the system NoFrost, a full natural defrost cycle may take 12 to 24 hours. It is not recommended to force this process to accelerate, since a sharp temperature change creates stress for the materials of the plastic case and rubber seals.
Organization of natural thawing and moisture collection
After turning off the equipment, the process of ice melting begins. In Liebherr models, water from the evaporator usually flows through special gutters into a drainage hole located on the back wall or at the bottom of the chamber. Next, the liquid enters the evaporation tank located above the compressor, where it safely evaporates.
However, when completely defrosted, the volume of water may exceed the capabilities of the drainage system, especially if a “fur coat” has formed in the chamber due to the door not being tightly closed earlier. Therefore, it is necessary to place well-absorbent rags under the lower tier of the freezer. Periodically, as they get wet, they should be squeezed out or changed.
To speed up the process, you can leave the doors of the freezer and refrigerator compartments wide open. This will ensure warm air circulates inside. If the room is hot, the process will go faster. You should not point fan heaters at the inside of the unit - this can lead to deformation plastic parts.
Why can’t you use a hair dryer?
Using a hair dryer creates local overheating. The plastic from which the internal walls and air ducts are made Liebherr can be deformed or melted even with short-term exposure to hot air. In addition, hot air promotes the formation of condensation on the electronic control boards, which can cause a short circuit the next time it is turned on. Natural thawing is the only safe method.
Cleaning the drainage system and internal surfaces
While the ice is melting, it's time to take care of hygiene. After the bulk of the ice has disappeared, it is necessary to thoroughly clean the drainage hole. It often contains food crumbs or mold that can clog the drain. For cleaning, use a special brush or soft wire wrapped in cotton wool.
Wipe the inner walls of the chamber with a solution of warm water and a mild detergent. To remove unpleasant odors, you can use a solution of baking soda (1 tablespoon per liter of water) or a slightly acidic solution of citric acid. Thoroughly rinse off any cleaning agent with clean water so that the chemical does not get on the products.
| Cleaning element | Recommended product | Tool | Frequency of treatment |
|---|---|---|---|
| Inner walls | Soda solution or special agent | Soft sponge | At each defrost |
| Drainage hole | Warm water | Syringe or brush | Once every 6-12 months |
| Rubber seal | Warm soapy water | Microfiber cloth | Monthly |
| EasyFreeze boxes | Warm water with detergent | Dish sponge | When each defrosting |
Pay special attention to the rubber door seal. Dirt and microorganisms often accumulate in its folds. Wipe it with a damp cloth and then wipe dry. To prevent the rubber from drying out and maintaining its elasticity, you can treat it with a special rubber conditioner or lightly lubricate it with petroleum jelly.
Drying the chamber and checking the tightness
Before turning on the refrigerator, make sure that the inside is completely dry. When freezing, residual moisture will turn into an ice crust, which will worsen heat transfer and force compressor to work with increased load. Wipe all surfaces with a dry cloth and leave the doors open for another 15-20 minutes to allow the moisture to completely evaporate.
During drying, check the condition of the sealing rubber around the entire perimeter. There should be no cracks, tears or areas where it has moved away from the body. Checking the tightness is carried out with a simple test: close the door, holding a sheet of paper between it and the body. If the sheet is pulled out with force along the entire length, the tightness is normal.
☑️ Ready to turn on
If you find that the seal is contaminated with grease, it must be degreased, otherwise the door will not fit tightly. This is a common cause of ice formation in the future. A clean seal ensures a tight fit and keeps cold inside the chamber.
First start-up and temperature stabilization
After completing all cleaning and drying procedures, you can start turning it on. Insert the plug into the outlet. Make sure the mains voltage is stable. Press the power button on the control panel. The indicators should light up on the display, and after a few seconds the current temperature will be displayed.
Do not rush to load the products right away. Let the Liebherr refrigerator run idle. You must wait until the temperature in the freezer drops to the set values (usually -18°C or lower). Depending on the ambient temperature in the room, this process can take from 2 to 6 hours.
⚠️ Attention: On some models with the function SuperFrost after switching on, the intensive freezing mode may be automatically activated. The indicator will flash until the desired temperature is reached. This is a normal situation, indicating the correct operation of the electronics.
While the chamber is getting cold, you can prepare the products for loading. If you defrosted the refrigerator as planned, the food was most likely preserved in cooler bags. Make sure that they do not have time to defrost completely.
Loading products and setting modes
When the temperature has reached the target values, you can carefully load the products. Try to distribute them evenly without blocking the ventilation openings. In systems NoFrost air circulation is critical; if you block the flows, zones with different temperatures will form in the chamber, which will lead to spoilage of products.
Check the temperature settings. For long-term storage of meat and semi-finished products, the optimal temperature -18°C or lower. If you are storing products that you plan to use in the coming days, you can set the mode -12°C (if such a function is provided by the model), which will save energy.
After loading the products, the door should be closed tightly and not open it unnecessarily for the next hour. This will stabilize the temperature. During the first hours of operation, the refrigerator may make more noise than usual - this means the compressor is running at full power, leveling the temperature. compressor at full power, equalizing the temperature.
Possible problems after defrosting
Sometimes after switching on, users encounter alarms. For example, the temperature alarm light may light up or an alarm sound may sound. If you have just turned on the refrigerator, this is normal - the system reports that the temperature has not yet reached normal. The signal can be turned off with a button on the panel, but the indicator will remain on until it cools down.
If, after the temperature has risen (after 5-6 hours), ice continues to form on the back wall or in the corners, this may indicate a malfunction. Possible reasons: the door is not tightly closed, the seal is damaged, the drain hole is clogged, or the defrost sensor is faulty.
If an error appears on the display (for example, codes F1, F2 etc.), refer to the user manual. These codes indicate specific malfunctions in the operation of electronics or sensors that could occur after a power surge when turned on.
Frequently asked questions (FAQ)
How long does it take to completely defrost a Liebherr freezer?
The time depends on the amount of ice and the temperature in the room. On average, the process takes from 8 to 24 hours. Do not try to artificially speed up the process by using hot water or a hairdryer, as this may damage the plastic elements of the structure.
Is it necessary to defrost a refrigerator with the NoFrost system?
Yes, it is necessary. The NoFrost system prevents the formation of ice on food and walls during normal operation, but does not completely remove moisture from food. Once every 1-2 years, it is necessary to carry out a complete defrosting for hygienic treatment and removal of old deposits that cannot be removed by automation.
Why does the refrigerator hum loudly after defrosting?
Immediately after turning on, the compressor works at maximum power to cool the chamber volume. This is the normal operating mode. If the noise does not subside after a day or is accompanied by vibration of the case, check whether the refrigerator is level and whether parts of it are touching the wall or furniture.
Is it possible to wash the inside of the refrigerator with hot water?
Using boiling water or very hot water (above +40°C) is not recommended, since a sharp temperature change can lead to cracks in the plastic. It is better to use water at room temperature or slightly warm with the addition of a mild detergent.
What to do if the water does not drain after defrosting?
Most likely, the drainage hole is clogged. Take a soft wire or a special brush and carefully clean the channel at the bottom of the back wall. Also check if the water drainage hose (if your model has one) behind the rear panel is not pinched.