Owners of household appliances are often faced with the need to diagnose internal components, especially when the unit begins to make extraneous sounds or ceases to maintain the set temperature. The question of where is the fan in the Pozis refrigeratorbecomes especially relevant for models equipped with a No Frost or Frost Freesystem. It is this element that is responsible for the forced circulation of air masses, ensuring uniform cooling of the chambers and preventing the formation of ice build-up on the evaporator.
Understanding the design is necessary not only for troubleshooting, but also for preventive cleaning, which extends the life of the compressor and the entire cooling system. In different modifications of the brand Pozis the location of the nodes may differ significantly, which requires an individual approach to each series. Next, we will analyze in detail the architecture of the device and the algorithms of search elements.
Principal layout in No Frost models
In refrigerators Pozisworking on technology No Frost, the fan (or fans) is the heart of the cold distribution system. Unlike classic models with a weeping wall, here the air does not circulate naturally, but is forced. The main location of the air blower is the space behind the rear wall of the freezer, in the so-called technical compartment, where the evaporator is also located. Access to this unit is most often closed with a plastic panel, which is secured with latches or screws. In some modifications, the fan can be combined with a defrost heater in a single unit, which requires special care during dismantling. The design may involve the presence of one common fan for both chambers or separate systems for the freezer and refrigerator compartment. evaporator.
Access to this unit is most often closed by a plastic panel, which is secured with latches or screws. In some modifications, the fan can be combined with a defrost heater in a single unit, which requires special care during dismantling. The design may involve one common fan for both chambers or separate systems for the freezer and refrigerator compartment.
It is important to note that in two-compressor models Pozis the circuit can be complicated by the presence of additional dampers and air ducts. In such cases, the refrigerator fan is often hidden at the top of the unit, above the main compartment, and hidden by a decorative cover or shelf. The exact location depends on the specific series, be it RD-1490, RK-1490 or newer lines.
⚠️ Attention: Before removing any protective panel inside the chamber, be sure to unplug the refrigerator from the electrical outlet. Working with components that are live or have a residual charge may result in electric shock or damage to the control electronics.
Access to the fan through the back panel of the freezer
The most common scenario that technicians and owners encounter when looking for a fan in refrigerators Pozis - this is access through the freezer compartment. To begin the procedure, it is necessary to completely defrost the unit, since the presence of ice on the evaporator can block access and damage the blades when trying to rotate. After defrosting, remove all drawers and shelves to free up space.
The back wall of the freezer is usually a plastic panel secured around the perimeter. Fastening elements can be hidden under decorative plugs or located deep in niches for drawers. In models with the system Full No Frost the panel can be quite massive and require careful handling of plastic latches, which become fragile at low temperatures.
After removing the panel, a ribbed evaporator radiator will be revealed to your view. The fan in this configuration is usually located directly in front of the evaporator or integrated into the ductwork. Its task is to suck warm air from the chamber, drive it through the cold tubes of the evaporator and return it cooled back into the chamber through special holes.
Why can’t you remove the panel without defrosting?
If you try to remove the back panel when there is ice on the evaporator, you risk damaging the refrigerant tubes or breaking the plastic fasteners that have frozen to the metal. In addition, ice can block the fan blades, and when turned on, the motor will burn out.
In some cases, the fan is attached to the evaporator housing itself or to a special frame surrounding the heating element. To remove it, you may need to disconnect several wires and unscrew the mounting screws that hold the motor in place. Be careful: the wires may be short, so do not use excessive force when pulling the panel.
Design features in the refrigerator compartment
While the main system fan No Frost is located in the freezer, additional blowers may also be present in the refrigerator compartment. They are necessary to implement the function Multi Air Flow or to ensure the operation of the freshness zone. The location of such a fan in refrigerators Pozis most often is in the upper part of the chamber, hidden behind a plastic casing.
To get to this unit, you often have to remove the top shelf or decorative trim under the ceiling of the refrigerator. Unlike a freezer, there is less risk of icing, but you must be careful with fragile plastic. The fan in the refrigerator compartment is usually smaller in size and makes less noise when operating.
The design may include a damper that regulates the flow of cold air from the freezer. The fan in this area works in tandem with temperature sensors and an electronic control module. If you find this element, check the cleanliness of its blades: the accumulation of dust and mold can cause an unpleasant odor or reduce cooling efficiency.
It is important to understand that in models with one compressor and system Frost Free the refrigerator fan may not be present as a separate unit, and circulation is carried out by the main freezer fan through the air duct system. In such cases, the search for a second fan will be unsuccessful, since it simply is not in the design.
Technical characteristics and types of motors used
In brand refrigeration equipment Pozis various types of electric motors are used for fans, which depends on the year of manufacture and model series. The most common are asynchronous motors with a squirrel-cage rotor, which are distinguished by their reliability and simplicity of design. However, in modern energy-efficient models, DC motors (DC) are increasingly used, allowing you to smoothly regulate the rotation speed.
The fan impeller is usually made of durable plastic that can withstand low temperatures and humidity. The diameter of the impeller varies depending on the required performance and the dimensions of the free space inside the technical compartment. Sliding or rolling bearings on which the shaft rotates are the most vulnerable point subject to wear.
Below is a table with approximate parameters of fans used in various series of refrigerators Pozis. This data will help you identify the faulty unit when selecting spare parts.
| Refrigerator series | Location | Motor type | Voltage (V) |
|---|---|---|---|
| Pozis RD-1490 | Freezer compartment | Asynchronous | 220 |
| Pozis RK-1490 | Freezer compartment | Asynchronous | 220 |
| Pozis Frio-252 | Upper part of the HK | DC (Direct Current) | 12-24 |
| Pozis Smart | Behind the evaporator | Asynchronous | 220 |
When replacing, it is important to take into account not only the geometric dimensions and voltage, but also the direction of shaft rotation, as well as the type of connection connector. Universal fans may require modifications to the mounting or connection diagram, so it is recommended to look for original spare parts or their complete analogues.
Fault diagnosis: noise, hum and lack of rotation
Understanding where the fan is located in the refrigerator Pozis, is necessary primarily for diagnosing problems. The most common complaint from users is the appearance of extraneous noise: humming, crackling or whistling. These sounds often indicate that the journal bearings are depleted or a foreign object has entered the blade rotation zone.
If the fan emits an intermittent hum or tries to start but stops, this may indicate a faulty start capacitor (in asynchronous motors) or problems with the electronic control module (in DC motors). Also, the cause may be icing of the fan itself, which often happens when the defrost system malfunctions.
To check the operation, you can carefully (observe safety precautions!) push the blades with your finger while the unit is turned on. If after a jolt the fan starts and operates normally, the problem is most likely in the trigger mechanism or lubrication. If a clear mechanical grinding noise is heard, the bearings require replacement or lubrication, or a complete replacement of the assembly is necessary.
- 🔊 Humming: Often indicates wear of the bearings or misalignment of the engine shaft.
- ❄️ Icing: The fan is covered with ice, the blades cannot turn - a sign of a failure in the defrost system.
- 🔌 Lack of reaction: The fan is silent even with the door open (in models where it should work constantly) - check the power circuit and module.
- 💨 Weak air flow: The blades are intact, the motor hums, but blows weakly - perhaps the evaporator or air ducts are dirty.
It is important to distinguish between compressor noise and fan noise. The compressor produces a low-frequency hum and vibration that is transmitted to the housing, while the fan creates characteristic aerodynamic noise or mechanical crackling, the localization of which is clearly determined deep in the chamber.
Instructions for safely replacing the fan
If diagnostics have confirmed the need for replacement, and you have determined where the fan is located in your refrigerator Pozis, you can begin repair work. This process requires care and consistency of actions. Violation of the technology can lead to damage to other components or disruption of the system's tightness.
The first step is always to completely disconnect the device from the network and defrost it for at least 24 hours. This is critical to the safety and integrity of the plastic elements. After defrosting, remove all interfering elements: shelves, drawers, containers for vegetables.
Next, you should dismantle the protective panel that blocks access to the technical compartment. Be careful with plastic latches. Disconnect the fan's electrical connector, having previously memorized or photographed the connection diagram of the wire colors. Unscrew the mounting screws holding the motor and remove the old unit.
☑️ Procedure for replacing the fan
Installing the new fan is done in the reverse order. Make sure that the wires are not pinched by the housing or touching heating elements or moving parts. After assembly, do not rush to load the products: let the refrigerator run idle for several hours to make sure there is no extraneous noise and the operating temperature is reached.
⚠️ Attention: If you are not confident in your abilities or are afraid of damaging the refrigerant circulation system (evaporator tubes), it is better to contact a specialized service center. Damage to the evaporator tubes will lead to freon leakage and costly repairs.
Prevention and care of the ventilation system
So that the question “where is the fan” does not arise in front of you too often due to breakdowns, it is recommended to carry out regular preventive maintenance. The main enemy of the ventilation system is dust and small debris, which accumulate over time on the blades and in the bearings, disrupting the balancing and increasing the load on the engine.
Once a year, during general defrosting, it makes sense to carefully remove the protective panel and visually inspect the condition of the fan and evaporator. If a layer of dust is detected, it can be removed using a vacuum cleaner with a soft attachment or a brush. Lubrication of bearings is possible only if the engine design provides for it (the presence of oilers or removable plugs), which is rare.
Also make sure that the door seals are in good condition. If the rubber does not fit tightly, warm, moist air enters the chamber, which leads to increased formation of frost on the evaporator and, as a result, to freezing of the fan. This creates additional load on the motor and can cause its premature failure.
Can a fan be lubricated with WD-40?
It is strictly not recommended to use WD-40 to lubricate electric motor bearings. This liquid is a solvent and washes away existing lubricant, after which it quickly evaporates, leaving the bearings dry. Use only special oils for electric motors or replace the entire assembly.
Following simple operating rules and timely defrosting (for models that require this) will allow the ventilation system to operate efficiently throughout the entire life of the refrigerator. Pozis. Remember that prevention is always cheaper than repairing or replacing expensive components.
Is it possible to operate a refrigerator if the fan does not work?
Short-term operation is possible, but not recommended. Without air circulation, the refrigerator will freeze unevenly: it will be very cold near the evaporator, and warm in the far corners. This will lead to spoilage of food and increased load on the compressor, which will work without stopping, trying to compensate for the lack of convection.
Why does the fan turn on only when the door is opened?
In some models of refrigerators Pozis a logic is implemented in which the fan stops when the door is opened, so as not to blow cold out and not pour cold air user. If, on the contrary, it starts to work only when it is opened, this may indicate a malfunction of the door limit switch or the peculiarities of the control system operation in energy saving mode.
How to determine that the fan motor has burned out?
Main signs: lack of rotation when voltage is applied (checked with a multimeter), presence of a burning smell, visible melting on the winding or housing, and also a characteristic hum without shaft rotation. If, when scrolling by hand, the shaft rotates tightly or jams, the bearings are worn out, which also requires replacement.
Where can I find the fan number to order a spare part?
The part number (art number) is usually printed on a sticker on the motor housing itself or on the plastic fan casing. Information can also be found in the service documentation (service manual) for a specific refrigerator model Poziswhich is often available on the Internet upon request of the model.