Owners of premium German equipment often wonder about the need and methods of defrosting, especially when it comes to complex systems like Liebherr BioFresh. Despite the widespread belief that modern units are completely autonomous, periodic maintenance is required even for models with the NoFrost function if you want to maintain ideal compressor performance and hygiene inside the chambers.
The process of defrosting two-chamber models is significantly different from servicing old manually controlled single-chamber freezers. Here it is critical not to damage sensitive electronics and maintain the tightness of the boxes with a zero zone. Incorrect actions can lead to failure of temperature sensors or disruption of air circulation.
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 system and prepare the unit for further exploitation. You will learn why you should not use a hairdryer and how to properly care for the seals so that the appliance will serve for decades.
Features of the defrosting system in Liebherr refrigerators
Most modern two-chamber models Liebherr are equipped with an automatic defrosting system for the refrigerator compartment and NoFrost technology in the freezer department. This means that condensation on the back wall of the main chamber flows into the groove and evaporates, and ice does not freeze in the freezer due to the circulation of cold air. However, this does not relieve the user of the need to carry out general defrosting at least once a year.
Why is this necessary if the equipment is “smart”? The fact is that the NoFrost system does not guarantee 100% absence of ice in the hidden cavities of the evaporator, especially if the door was used carelessly or was kept open for a long time. In addition, over time, fatty deposits and food particles can accumulate in the drainage channels, which require warm water removal. Stagnant moisture is an ideal environment for bacteria and mold. Warm water Models with a zone have additional complexity: there are special containers with controlled humidity and a temperature of about 0°C. These drawers and slides also require careful cleaning as they can harbor microorganisms that can spoil fresh food. Mechanical cleaning without complete thawing is ineffective here.
Models with zone BioFresh have an additional complexity: there are special containers with controlled humidity and a temperature of about 0°C. These drawers and slides also require careful cleaning as they can harbor microorganisms that can spoil fresh food. Mechanical cleaning without complete thawing is ineffective here.
It is important to understand that electronics Liebherr are very sensitive to changes in temperature and humidity. An attempt to speed up the defrosting process using aggressive methods can lead to microcracks in the plastic or damage to the wiring. Natural thawing is the only safe way to preserve expensive equipment.
Preparation for the defrosting procedure
Before starting any manipulations It is necessary to properly prepare the workplace and the unit itself. First, clear the space in front of the refrigerator to allow easy access to the back and bottom of the unit. This is necessary to check the drainage hole and possible installation of water containers.
Next, you should completely disconnect the device from the power supply. It is not enough to simply unscrew the temperature regulator to zero - you need to physically remove the plug from the socket. This will protect you from electric shock and prevent the compressor from trying to start during defrosting, which can be dangerous if water is present.
⚠️ Warning: Never pull the refrigerator by door handles or decorative elements when moving. Handle only the base part or special transport recesses so as not to damage the hinge fastenings.
Remove all products. If defrosting takes place in winter, the food can be taken out to the balcony, packed in thermal boxes. In summer, use cooler bags with ice. Completely empty shelves, drawers BioFresh and door baskets. It is better to remove the glass shelves separately so that they do not burst due to a sharp temperature change when washing.
Prepare the necessary equipment in advance so as not to run after it with wet hands. You will need:
- 🧽 Several soft sponges and microfiber rags for wiping surfaces.
- 🧼 Specialized detergent for refrigerators or a weak soda solution.
- 🥣 Containers with warm water (not hot!) for rinsing details.
- 🔦 Flashlight for inspecting hard-to-reach places and the drainage channel.
Step-by-step defrosting process
After the refrigerator is turned off and empty, leave the doors of both compartments completely open. This will provide an influx of warm air and start the natural process of ice melting. Depending on the amount of ice and the temperature in the room, the process can take from 3 to 10 hours.
Do not try to knock off the ice with a knife, screwdriver or other sharp objects. In refrigerators Liebherr the evaporator is often located very close to the inner wall or even built into it. One awkward move and the refrigerant will come out, which will lead to expensive repairs or complete disposal of the device.
You can use safe methods to speed up the process. For example, place bowls of warm (not boiling water!) water inside the chambers. Steam will speed up the melting. You can also point the fan at open doors, but do not use a hairdryer - hot air can deform the plastic case or damage the seals.
☑️ Checklist for proper defrosting
While the thawing process is in progress, start washing the removable elements. Shelves, drawers BioFresh and containers should be washed in a bathtub or large basin. Use warm water and a mild detergent. Rinse them thoroughly to ensure there is no chemical smell left that could be absorbed into the food.
Pay attention to the rubber seals on the doors. They also need to be washed carefully, removing dirt from the folds. If the seal is dirty, the door may not fit tightly, which will lead to a loss of cold and increased compressor operation.
Care for the BioFresh zone and drainage system
The Freshness zone BioFresh is the heart of your refrigerator, responsible for the preservation of vitamins in food. Drawers in this area often have a complex design with adjustable humidity dampers. When defrosting, they must be removed and washed thoroughly, paying attention to the guides along which they move.
Pay special attention to the drainage hole. It is usually located on the back wall of the refrigerator compartment. This is where the condensate flows. Over time, a plug of dirt or mold may form there. To clean, use a special brush-brush (often included) or a soft wire wrapped in cotton wool.
Carefully pour a little warm water into the drainage hole to check the permeability. If the water drains slowly, repeat the procedure. Clean drainage guarantees the absence of puddles under the refrigerator and no unpleasant odor.
| System element | Cleaning frequency | Cleaning agent | Risk if ignored |
|---|---|---|---|
| Internal walls | At each defrosting | Soda solution or special. spray | The appearance of mold and odor |
| Drainage hole | Once every 6-12 months | Warm water, brush | Water leakage on floor |
| BioFresh boxes | At each defrost | Warm soapy water | Contamination of fresh food |
| Rubber seals | Once every 3 months | Damp cloth, glycerin | Seal failure |
After washing all parts, let them dry completely. Wet elements installed back can cause re-formation of condensation and ice immediately after switching on.
Can BioFresh boxes be washed in the dishwasher?
Technically, plastic will withstand the temperature, but manufacturers Liebherr they do not recommend doing this. Aggressive cleaning tablets and high temperatures can make the plastic cloudy, brittle, or change its geometry, causing the drawer to no longer close tightly. Hand washing is better.
What you absolutely should not do
There are a number of myths and dangerous advice that can be found on the Internet. Following them may damage your Liebherr. The main rule is no aggressive mechanical impact on the ice.
Using knives, chisels or blades to chip ice is a direct path to breakdown of the evaporator. In modern models, the evaporator tubes can be mounted into the wall or located close to it. Repairs after such “aggressive” defrosting are often not economically feasible.
⚠️ Attention: It is prohibited to use hair dryers, heat guns or heaters to speed up defrosting. Sudden heating of the plastic causes its deformation, and drops of hot water falling on cold glass or metal can cause thermal shock and cracks.
It is also not recommended to use chemical solvents, acetone, gasoline or abrasive powders to clean the internal chambers. The plastic in refrigerators is sensitive to chemicals and may crack or change color. In addition, residues of aggressive chemicals can poison food.
Do not turn on the refrigerator until it is completely dry. Water that gets into electrical contacts or sensors can cause a short circuit. Make sure that all surfaces are dry to the touch.
Completion of the process and first launch
When all the parts are washed and dried, and there are no traces of moisture left inside the refrigerator, you can begin assembly. Replace the shelves, grilles and drawers BioFresh. Make sure that they are positioned correctly and that nothing is blocking the free movement of air.
Plug in the refrigerator. The indicators on the display (if present) will light up. Let the appliance run idle for 1-2 hours without food. This is necessary for the compressor to reach the optimal temperature and for the system to stabilize.
Check the operation of the system. After a couple of hours, touch the walls - they should be cold. Make sure there is no standing water in the drainage channel. If everything is in order, you can gradually load the products. Do not overcrowd the refrigerator at once - let the cold be evenly distributed.
Regular maintenance prolongs the life of the equipment. If you carry out this procedure once a year, your Liebherr will delight you with quiet operation and ideal cold for many years.
How long does it take to completely defrost a Liebherr?
The time depends on the temperature in the room and the thickness of the ice. Typically the process takes from 3 to 6 hours. Do not try to speed it up artificially if you do not want to damage your equipment.
Do you need to defrost a refrigerator with NoFrost?
Yes, you do. The NoFrost system only removes ice from the evaporator, but does not prevent contamination of internal surfaces, odors, or clogged drains. General cleaning and defrosting are required at least once a year.
What to do if an unpleasant odor appears after defrosting?
Most likely, you did not rinse the drainage hole properly or there were contaminants left in hidden cavities. Try rinsing the drainage with a solution of citric acid or a special product. Also check the condensate container at the back of the refrigerator (near the compressor).
Can BioFresh drawers be washed with hot water?
No, the water should be warm (up to 40°C). Hot water can deform the thin plastic from which the containers are made, and they will no longer seal tightly.