Modern refrigerators have ceased to be just freezers, turning into complex climate systems that preserve food freshness. A special filter is often installed inside these units, the existence of which many owners do not even suspect until scheduled maintenance or the appearance of foreign odors. a special filter, the existence of which many owners do not even suspect until scheduled maintenance or the appearance of foreign odors.
This small element plays a critical role in maintaining hygienic safety stored food, preventing the growth of bacteria and absorbing unpleasant odors. Understanding the principle of its operation will help you extend the life of your equipment and avoid spoilage of expensive food products.
In this article we will look in detail at what filters there are, how they work and why ignoring their replacement can lead to serious problems with compressor and the condensate drainage system.
Main purpose and principle of operation
The main task of any filtration element in the refrigeration chamber is air purification from volatile organic compounds that emit products during storage. Vegetables, fruits, meat and fish, in the process of natural ripening or spoilage, emit ethylene and other gases that accelerate decay.
The principle of operation is based on adsorption: passing through the porous structure of the material, odor molecules and bacteria are retained inside without spreading throughout the entire volume of the chamber. This creates the effect of a “sterile zone,” significantly increasing the shelf life of fresh herbs or berries.
In addition, some advanced models are equipped with systems with ionizationthat not only retain contaminants, but also actively neutralize pathogenic microflora. This is especially true for refrigerators of the No Frost system, where air circulation occurs constantly.
⚠️ Attention: If you notice that the refrigerator has begun to make a strange humming sound when the compressor starts, check whether the air channel is clogged with the filter. Excessive airflow resistance can load the motor.
Cleaning efficiency directly depends on the quality of the filler and the tightness of the filter in the seat. Even microscopic cracks can negate the work of the entire filtration system, allowing contaminated air to pass past the purifier.
Types of filtration elements in modern refrigerators
Manufacturers of climate control equipment use various technologies cleaning, choosing them depending on the device class and price segment. The most common option remains carbon filterwhich contains granules of activated carbon.
Coal has a huge surface area per unit weight, which allows it to effectively capture odor molecules. Such elements are often found in brand models Liebherr, Bosch and Siemens.
More expensive models can be equipped with HEPA filters or elements coated with noble metals such as silver or platinum. Silver is known for its bactericidal properties and prevents the formation of mold on the walls of the chamber.
They also exist deodorizers based on zeolite - a mineral that works on the principle of a catalyst, splitting ethylene into water and carbon dioxide. This is especially useful for storing fruits that are sensitive to gas environments.
Where the filter is located and how to get to it
The location of the filter element varies depending on the design of the refrigerator. In most models with the system No Frost it is located directly inside the refrigerator compartment, often on the back wall or in the top.
In some cases, access to it is blocked by a decorative plastic panel, which must be carefully removed. In other models, especially built-in ones, the filter may be integrated into the air duct system and located behind the rear wall.
To accurately determine the location of the element in your model, you must contact user instructions. Typically, the manufacturer marks the installation location with a special icon or the inscription "Filter".
The removal process, as a rule, does not require tools: the element is either pulled out of the groove or unscrewed by turning it counterclockwise. The main thing is to act without excessive force so as not to damage the plastic latches.
Hidden installation locations
In some older models, the filter may be located in the evaporator area, access to which requires partial disassembly of the rear wall of the chamber. Be careful with fragile plastic parts.
Symptoms of contamination and replacement time
The resource of any filter material is limited. Over time, the pores become filled with pollutants, and the element ceases to perform its functions, even becoming a source of an unpleasant odor. You can determine the need for replacement by a number of signs.
If the products begin to deteriorate faster than usual or a stable product appears in the chamber unpleasant odorthat does not disappear after washing, this is the first signal. It is also worth paying attention to the appearance of the element itself: a change in the color of the granules or the appearance of mold indicates critical wear.
The standard service life of carbon filters is from 6 to 12 months, depending on the intensity of use of the refrigerator and the amount of stored products with a strong aroma.
For your convenience, we have compiled table with indicative resources of various types of purifiers:
| Filter type | Average service life | Signs of wear | Replacement cost |
|---|---|---|---|
| Activated coal | 6-8 months | Odors, dust | Low |
| Silver coating | 12 months | Darkening, mold | Average |
| Zeolite | Up to 10 years (regeneration) | Mechanical destruction | High (initial) |
| HEPA | 12 months | Reduced airflow, noise | High |
If a lot of fish, meat or spices are constantly stored in the refrigerator, the filter resource may be exhausted faster.
☑️ Checking the condition of the filter
Instructions for replacement and maintenance
Replacing the filter is a simple procedure that can be performed independently without calling a technician. However, it is important to follow the sequence of actions so as not to break the tightness of the chambers.
First you must turn off the refrigerator from the network or at least open the doors in order to stabilize the temperature and avoid load on the compressor during work. Then remove the old element, following the fastening design.
It is recommended to wipe the seat of the new filter with a damp cloth, removing accumulated dust. Install the new element, firmly fixing it until it clicks or stops.
Some modern models, such as Samsung Family Hub or LG InstaViewhave an electronic monitoring system. After replacement, you must reset the indicator through the settings menu so that the timer starts counting again.
⚠️ Warning: Do not attempt to wash disposable carbon filters with water. Water destroys the structure of the carbon and washes away the active components, after which the filter will become useless and may become moldy.
Is it possible to use a refrigerator without a filter
Often users ask the question: what will happen if you simply remove the filter and do not install a new one? Technically, the refrigerator will continue to work, freeze and perform its basic functions.
However, the lack of filtration will lead to rapid mixing of odors. The aroma of defrosted meat can permeate cakes, and the smell of fish can permeate vegetables. This significantly reduces the quality of storage.
In addition, in systems with air circulation, the absence of a filter element can lead to small debris and dust getting into air ducts and onto the evaporator. Over time, this will reduce the efficiency of heat transfer and increase energy consumption.
In models where the filter is part of the design (locks access to important components or is part of the air duct), operation without it may be physically impossible or will lead to a violation of the airflow geometry.
Savings or risk?
An attempt to “reanimate” an old filter by calcining it in the oven is dangerous. Coal dust can ignite and the plastic casing can melt, contaminating the chamber with toxins.
Frequently asked questions (FAQ)
How often should you change the carbon filter in your refrigerator?
The optimal replacement frequency is once every 6-12 months. The exact period depends on the filter model and the intensity of use of the refrigerator compartment. If you store a lot of products with a strong odor, change more often.
Can the filter be washed with water and reused?
No, most modern filters (especially carbon) are disposable. Water destroys the structure of the adsorbent. Reuse is possible only for some models of zeolite filters after special heat treatment, if this is indicated in the instructions.
Where can I buy an original filter for my refrigerator?
Original components are best purchased from the brand’s authorized service centers or large household appliance stores. On the body of the old filter there is usually an article number (Part Number) by which you can find an analogue.
What to do if there is still a smell after replacing the filter?
Give the new filter time to activate (up to 24 hours). If the smell does not go away, check whether the element is installed correctly, whether there are any gaps, and thoroughly wash the internal surfaces of the refrigerator with a soda solution.