Owners of modern refrigeration units are often faced with a dilemma: is manual defrosting necessary if NoFrost technology is declared? Model Liebherr CNPes 4313 belongs to the premium segment of equipment, where advanced air circulation systems have been introduced. However, even the most advanced mechanisms require periodic maintenance to maintain their durability and energy efficiency.
Ignoring basic operating rules can lead to a decrease in the quality of food cooling. In this material, we will analyze in detail the physics of the processes inside your refrigeration chamber and determine when human intervention is really necessary.
It is important to understand that the term “defrosting” in the context of combined models is often confused with ordinary hygienic cleaning. Automatic system it actually takes upon itself to remove moisture from the evaporator, but this does not relieve the owner from the obligation to monitor the cleanliness of the internal surfaces.
Features of the NoFrost system in the CNPes 4313 model
Technology NoFrost, used in the freezer compartment of this model, implies forced circulation of dry cold air. Fans drive currents throughout the entire volume, preventing moisture from settling on the walls and products. This eliminates the need to manually chip ice from the freezer shelves.
In the refrigerator compartment there is a system SmartFrost or its analogues, where moisture settles on the back wall, freezes, and then flows into a special gutter during the defrost cycle. The automation itself controls this process by starting the compressor and heating element.
⚠️ Attention: Attempts to artificially speed up defrosting using a hairdryer or hot water can damage the plastic elements and break the tightness of the seals.
Despite automation, failures may occur in the system. A clogged drain hole is a common reason why water stops draining and begins to accumulate at the bottom of the chamber. In such cases manual intervention becomes inevitable.
When defrosting is really required
There are a number of signs that indicate that your Liebherr CNPes 4313 requires complete defrosting. First of all, this is the appearance of visible ice in the freezer, which is an anomaly for the NoFrost system. Ice thickness of more than 3-5 mm is already considered critical.
The second signal is the appearance of puddles on the kitchen floor or inside the bottom drawers of the refrigerator. This indicates that drainage channel clogged with food particles or ice, and the condensate does not go to the evaporator. Another reason is the appearance of an unpleasant odor, which is not eliminated by standard washing.
- ❄️ Formation of a “fur coat” on the evaporator, visible through the grille.
- 💧 Water on the floor or on the bottom shelf of the refrigerator compartment.
- 📉 A noticeable decrease in the efficiency of cooling products.
- 🔊 Increased noise from the compressor or fans.
If you notice one of these symptoms, you need to plan a defrosting procedure. You should not wait until the ice crust becomes thick, as this creates an additional load on the compressor unit. data-i="74">Never encountered compressor unit.
Step-by-step instructions for defrosting
The process of preparing equipment for defrosting requires a sequence of actions. First you need to empty the chambers of food. Place them in bowls with ice or in another working refrigerator to maintain the storage temperature.
Next, you should disconnect the device from the power supply. Unplug the cord from the outlet or turn off the circuit breaker on the panel. Only after this can you begin to remove the internal elements. Remove all shelves, drawers EasyFresh and guides so that they do not interfere with air circulation during natural melting.
☑️ Defrosting algorithm
Leave the refrigerator and freezer doors completely open. To speed up the process, you can place a container with warm (not boiling water!) water inside. It is strictly forbidden to use sharp objects to chip ice, as this can puncture the cooling circuit.
⚠️ Attention: The use of chemical ice solvents is prohibited, as their vapors can be absorbed into plastic parts and subsequently transferred to products.
Cleaning the drainage system
After the main volume of ice has melted, attention should be switched to the drainage hole. It is usually located on the back wall of the refrigerator compartment. This is where dirt most often accumulates, preventing the flow of water.
For cleaning, use a special flexible brush-brush, which often comes with Liebherr equipment, or a regular soft wire wrapped in cotton wool. Carefully walk through the channel to remove the blockage. Then pour in a small amount of warm water to check the permeability. Liebherr, or ordinary soft wire wrapped in cotton wool. Carefully walk through the channel to remove the blockage. Then pour a small amount of warm water into it to check the permeability.
| System element | Check frequency | Tool | Risk of ignoring |
|---|---|---|---|
| Drain hole | Every 3-6 months | Brush, syringe | Puddles on the floor |
| Door seals | Once a month | Wet fabric | Tightness failure |
| Ventilation grilles | Once a year | Vacuum cleaner, brush | Noise, overheating |
| Back wall | When defrosting | Soft sponge | Mold, smell |
If the water drains slowly, repeat the washing procedure. Make sure that the condensate tray located above the compressor (bottom back) is also clean and not overfilled.
What to do if the water does not drain?
If mechanical cleaning does not help, the ice pin deep in the channel may have frozen. In this case, leave the refrigerator turned off for a day with the doors open. If the problem persists, you need to call a technician to purge the system with nitrogen.
Drying and starting after defrosting
After the ice has completely melted and cleaned, you must thoroughly wipe all internal surfaces with a dry soft cloth. Make sure that there is no moisture left in the recesses and joints. A humid environment promotes the growth of bacteria and the appearance of mold.
Return all removable elements: shelves, drawers, containers for vegetables. Allow the plastic to warm up to room temperature before loading food to avoid thermal shock to the glass shelves.
Now you can plug in the refrigerator. Set the required temperature conditions. For the model CNPes 4313, the optimal temperature in the refrigerator compartment is considered to be +4°C, and in the freezer compartment -18°C. Let the unit run idle for about 2-3 hours before loading products.
Typical mistakes when defrosting
Many users make mistakes that can shorten the service life expensive equipment. The most common one is using a hair dryer to speed up defrosting. Hot air can deform plastic parts plastic parts and damage seals.
Another mistake is leaving the light on inside the chamber during defrosting, if the model allows it. The lamp heats the space, but unevenly, which can lead to local overheating of the temperature sensors.
- 🚫 Do not use a knife or screwdriver to chip ice.
- 🚫 It is forbidden to pour boiling water directly onto the ice crust.
- 🚫 Do not turn on the device, until it is completely dry.
- 🚫 You cannot ignore cleaning the drainage every time you defrost.
Following these simple rules will allow your Liebherr to serve for many years without losing its technical characteristics. Regular care saves energy and preserves food freshness.
How often does Liebherr CNPes 4313 need to be defrosted?
During normal operation and a working NoFrost system, complete defrosting is required no more than once a year, mainly for hygienic cleaning. However, if the doors are opened frequently or there is high humidity in the room, this may be required every 6 months.
Why does ice form in the NoFrost freezer?
The main reasons: a loose door, a damaged seal, frequent opening of the door or a clogged moisture drainage system. Ice may also appear when loading warm products.