Owning modern refrigeration equipment from a German brand Liebherr is often associated with the misconception that such units do not require maintenance at all. Indeed, systems NoFrost and Liebherr SmartFrost make life much easier by preventing the formation of massive ice crusts. However, even the most advanced equipment requires periodic hygienic defrosting to maintain the efficiency of the compressor and the freshness of the products.
Ignoring the need for preventive cleaning can lead to the evaporator becoming covered with a thin but dense layer of ice, which the sensors do not perceive as critical, but which reduces heat transfer. As a result energy consumption increases, and the service life of the unit is reduced. Therefore, it is important to know how to correctly carry out this procedure without damaging fragile electronics and touch control panels.
In this guide, we will go through in detail the process of preparing, shutting down, cleaning and restarting your refrigerator. We will pay special attention to the nuances of working with different types of chamber coatings and the peculiarities of resetting errors after returning the device to normal operation.
Preparing for the defrosting process and releasing the chambers
The first and most important stage is preparing the space around the unit. You need to free access to the back wall of the refrigerator, where the condenser grille is located, which ensures heat dissipation. Move the appliance away from the wall at least 10-15 centimeters to ensure air circulation and safe operation during the defrosting process.
Next, you should completely empty the freezer and refrigerator compartments of food. If you plan to defrost only the freezer, and the main chamber operates independently, you do not have to remove food from it, but access to the freezer compartment should be maximum. All drawers, shelves, egg trays and bottle containers must be removed.
- ❄️ Prepare a container of warm water for quick rinsing of removable elements.
- 🧼 Purchase a mild detergent without abrasive particles and odor in advance.
- 🧽 Find some dry cotton towels or rags to catch moisture.
- 🔌 Make sure the power cord is long enough to plug into an outlet in another room, if needed.
It is best to wash removable parts separately in a bathtub or large sink. Use warm water and a soft sponge. Abrasive powders or hard brushes can scratch the plastic, and these micro-scratches will subsequently collect dirt that is almost impossible to wash out. After washing, allow the parts to dry naturally or wipe them dry.
⚠️ Attention: Never use hot water (temperatures above 45°C) to wash plastic drawers and shelves. A sudden change in temperature can cause deformation of the plastic or the appearance of cracks, especially if the parts were previously in the freezer.
Properly turning off the power supply and defrosting the ice
The safest defrosting method for electronics Liebherr is natural thawing. After removing products and removable elements, you must disconnect the device from the power supply. On some electronically controlled models, this can be done through the menu by switching the device to Offmode, but physically unplugging the cord from the outlet is a more reliable guarantee of safety.
Leave the freezer and refrigerator doors open. To speed up the process, you can place containers with warm, but not boiling, water at the bottom of the chambers (if there are no glass shelves that could burst from the drop). The steam generated in this case will help to quickly soften the ice formations on the evaporator.
It is strictly forbidden to use sharp objects such as knives, screwdrivers or chisels to chip ice. The inner walls of the chambers, especially in models with the SmartFrostsystem, have a special coating that is very easy to damage. A breakdown of the wall leads to a refrigerant leak and expensive repairs, which are often not economically feasible.
- 🚫 Do not use a hair dryer to speed up defrosting - hot air can damage the plastic seals.
- 🚫 Do not pour boiling water directly onto the ice - this creates a risk of thermal shock for the materials.
- 🚫 Do not use chemical solvents or alcohol to remove ice.
The natural defrosting process can take from 3 to 5 hours, depending on the amount of frozen ice and the room temperature. At this time, it is recommended to periodically wipe the draining water with a rag so that it does not get on the floor or inside the technical compartments of the unit.
Cleaning the internal surfaces and caring for the seals
While the ice is melting, it’s time to thoroughly clean the internal surfaces. Even if the chamber appears clean visually, there may be bacteria and mold on the walls, which can cause an unpleasant odor. For washing, use a solution of baking soda (one tablespoon per liter of water) or specialized products for household appliances.
Pay special attention to the rubber seals on the doors. It is in the folds of the seal that dirt and black mold most often accumulate. Wipe them with a soft cloth soaked in soapy water. After cleaning, the rubber can be lightly lubricated with silicone grease or petroleum jelly to maintain its elasticity and prevent drying out.
| Element | What to wash | What to treat after | Frequency |
|---|---|---|---|
| Plastic boxes | Warm water + soda | Dry rags | Every defrosting |
| Glass shelves | Detergent glass | Microfiber | As it gets dirty |
| Rubber seal | Soap solution | Silicone grease | Once every 3-4 months |
| Internal walls | Special product for refrigerators | Dry cloth | Once every six months |
After washing, be sure to wipe all surfaces dry. The remaining moisture will turn into a new layer of frost when the compressor is turned on, which will negate all your efforts. Make sure the drain hole (if your refrigerator model has one) is not clogged. It can be carefully cleaned with a special brush or cotton swab.
Drying and assembling refrigeration equipment
Before turning on the device, you must make sure that it is completely dry. Moisture should not remain anywhere: neither on the shelves, nor in the corners of the chambers, nor in the air supply ducts. Leave the doors open for another 20-30 minutes after finishing wiping so that any remaining moisture evaporates.
Begin assembly by installing all removable elements in their places. Make sure the shelves fit snugly and securely in place. Freezer drawers should slide out and close easily without any effort. If you notice that some element is deformed, do not force it to be installed.
Now you can connect the refrigerator to the network. After switching on, do not rush to load products. Let the unit run idle for at least 2-3 hours (for a freezer, the time may be longer) so that it reaches the required temperature. Indicators on the control panel Liebherr will tell you when the storage mode has been reached.
⚠️ Attention: If you hear a loud knocking or humming noise after turning on, turn off the device immediately. This may mean that the compressor oil did not have time to return to the crankcase if the refrigerator was lying for a long time or tilted strongly during defrosting.
☑️ Ready to start
Features of defrosting models with NoFrost and SmartFrost
Equipment owners Liebherr often wonder: is it necessary to defrost the system NoFrost? Technically, in such models, water is removed from the evaporator automatically. However, once every 6-12 months it is recommended to carry out preventive defrosting. This is necessary to remove odors and disinfect the channels through which cold air circulates.
The system SmartFrostused in freezers Liebherruses a special evaporator coating and a sealed design so that ice does not freeze on the food, but collects on the back wall. Despite the name, such chambers still require manual defrosting when the layer of ice becomes noticeable (usually 3-5 mm).
The main difference when servicing such models is care with the air channels. In NoFrost refrigerators they are often located on the back wall or at the top of the compartment. When cleaning, do not fill these holes with water, as liquid can flow inside the case and damage the electronics or the fan.
Why does ice still appear in NoFrost?
Ice appears in NoFrost systems if the door is left open for a long time, the seal is broken, or hot products are placed in the chamber. Also, the cause may be a clogged drainage channel through which water is discharged to the evaporator.
When cleaning models with forced air circulation, make sure that the fan blades (if visible) rotate freely and are not blocked by pieces of ice or packaging. A blocked fan may burn out when trying to start.
Starting after defrosting and checking the operation of the system
After the refrigerator has worked for several hours without load, check the quality of cooling. The temperature in the main chamber should be about +4...+5°C, and in the freezer - -18°C and lower. The display Liebherr should not display warnings about an open door or high temperature.
If the red alarm indicator on the panel lights up or a beep sounds, this is normal for the moment immediately after switching on. But if the signal does not stop after entering the mode, check the settings. Perhaps the parameters have gone wrong or a function has been activated SuperFrostthat needs to be turned off manually.
- 🌡️ Check the uniformity of cooling by placing a thermometer in different parts of the chamber.
- 🔇 Listen to the operation of the compressor - it should not work continuously.
- 🚪 Make sure the doors close tightly and do not open on their own.
Now you can load the products. Try not to fill the chamber completely at once, especially with warm foods, so as not to create excessive load on the compressor. Distribute food so that it does not block the flow of cold air.
Frequently asked questions (FAQ)
Is it possible to defrost a Liebherr refrigerator without unplugging it?
It is strictly not recommended. Although modern models are protected against voltage surges, operating the compressor during the active phase of ice melting (when water can get on the contacts or sensors) creates a risk of short circuit. In addition, the thermostat may not read the temperature correctly, and the motor will wear out.
How often do you need to defrost a freezer with the SmartFrost system?
The manufacturer recommends preventive defrosting and cleaning once a year. However, the frequency depends on the operating conditions: room humidity, frequency of door opening and amount of food. If you notice that the ice has begun to accumulate faster than usual, you should carry out the procedure earlier.
What to do if the refrigerator does not freeze after defrosting?
First, wait 4-6 hours. The refrigerant may need time to circulate, or there may be condensation left in the system. If the temperature does not drop after 24 hours, check that the door is closed tightly and that the fan is running. If the problem persists, you need to call a technician to diagnose the compressor or freon leak.
Is it possible to use a steam cleaner to clean the refrigerator?
The use of steam cleaners is not recommended for the internal chamber, since hot steam under pressure can damage plastic parts and seals, as well as drive moisture into the thermal insulation layer. Steam can be carefully used only on external metal surfaces, using caution.