Failure of the cooling system in the refrigerator often becomes an unpleasant surprise, forcing you to look for a solution to the problem as soon as possible. If the diagnostics showed that a freon leak occurred precisely in the sealed part, namely in the evaporator, then the owner of the equipment is faced with the difficult task of finding a compatible spare part. Choose an evaporator for refrigerator It’s not easy to buy the first part you come across in the store, since the physical dimensions and design features of different models can differ radically.
The wrong choice of component will lead to the fact that the part simply will not fit into its normal place or will not be able to effectively remove heat, which will require repeated disassembly and extra costs. In this article, we will look in detail at how to determine the type of your system, take accurate measurements and choose an analogue that will last for many years. Refrigeration evaporator is the heart of the system, and its replacement requires accuracy and understanding of the principles of operation of the refrigeration unit.
Fault diagnosis and types evaporators
Before you start looking for a spare part, you need to make sure that the problem lies in the heat exchanger, and not in the compressor or thermostat. Most often, a broken evaporator is indicated by swelling of the wall inside the chamber, a characteristic whistling sound of escaping gas, or a complete lack of cold when the engine is running. Refrigerant leak in a sealed circuit - the most common cause of failure of modern refrigerators.
There are two main types evaporators, and the method for finding a replacement depends on this. In systems No Frost (without frost), the evaporator is hidden behind a plastic panel in the freezer and is a coil with aluminum fins. In drip systems (crying evaporator), the heat exchanger is often sealed into the housing wall or located on the rear wall of the refrigerator compartment. It is critically important to accurately determine the type of your system, since evaporators from No Frost and drip systems are not interchangeable.
If you are the owner of a model with the No Frost system, then visually assessing the condition of the rear part is easier: just remove lid in the freezer. For older models with tubes sealed into the wall, diagnostics are more difficult and often require puncturing the circuit to check the pressure. Aluminum evaporators are more susceptible to corrosion, while steel or copper analogues can last for decades, but are more difficult to find on sale.
⚠️ Attention: If Upon visual inspection, you find a black sticky mass (oil) at the bottom of the refrigerator or smell a strong chemical odor, immediately stop using the appliance and ensure the room is ventilated. These are signs of serious depressurization of the system.
Understanding the design of your unit is the first step to success. Do not try to guess the model of a part, relying only on the appearance of the refrigerator from the outside, since within the same series manufacturers could use different layouts of components.
How to correctly take dimensions and determine the model
The selection process begins with dismantling the old part or careful measurements of the accessible part, if removal is not yet possible. For systems No Frost you will need to completely disassemble the freezer by removing shelves, drawers and protective plastic panels. Only after this is access to the metal block, which must be replaced.
The key parameter when choosing is the heat exchange area, which directly depends on the dimensions. You will need to measure the height, width and depth of the radiator itself (not including the plastic casing or mountings). The distances between the mounting holes and the diameter of the inlet pipes are also important. Measurement accuracy up to a millimeter ensures that the new element will fit into the standard places without the need to drill new holes or bend the tubes.
Pay attention to the configuration of the condensate collection pan, if it is integrated into the design evaporator. In some models Samsung or LG the tray is part of the aluminum block, and its absence will make it impossible to drain melt water. Also consider the location of the defrost heating element - it can be built-in or installed separately.
☑️ Measurements before purchase
Do not forget that even from one manufacturer, dimensions can change from year to year. Therefore, relying only on the refrigerator model when ordering spare parts is risky. It is best to dismantle the old unit and compare it with photographs on the seller’s website or take it with you to the store as a sample.
Manufacture materials: aluminum, copper or steel
Modern industry offers evaporators made of different materials, and each of them has its own advantages and disadvantages. Most of the factory parts installed during assembly are made of aluminum. They are lightweight, cheap to produce and have good heat transfer, but are extremely sensitive to mechanical damage and corrosion.
When replacing, a dilemma often arises: to use original aluminum or look for a more reliable option. Copper evaporators They are less common and are usually used in professional equipment or as a repair option. Copper has better thermal conductivity and corrosion resistance, but it is much more expensive and heavier. Steel options are a compromise, having high strength but lower heat transfer efficiency compared to copper.
If you are choosing between materials for a household refrigerator, consider the option with a protective coating. Some manufacturers apply a special varnish to aluminum plates that prevents oxidation. Galvanized steel Can also be found in budget models, but they are prone to rust with constant contact with moisture.
Why does aluminum burst?
Aluminum is a soft metal that is easily deformed. During cyclic defrosting (expansion and contraction of ice), microcracks may appear in soldering or bending areas, which over time turn into fistulas. In addition, aluminum is susceptible to electrochemical corrosion when in contact with other metals in the presence of moisture.
When purchasing, pay attention to the thickness of the tube walls. Thin-walled aluminum will fail faster, especially if there are traces of acid left in the system from the combustion of the compressor. In such cases, it is recommended to install a larger volume filter-drier.
Compatibility of brands and search for analogues
The spare parts market is structured in such a way that original parts from brands like Whirlpool, Bosch or Indesit can be unreasonably expensive. Fortunately, there are many universal analogues that are produced in the same factories, but sold under different brands. For example, evaporators ALFA or CRH are often direct substitutes for dozens of refrigerator models.
When searching for an analogue, it is important to consider not only the dimensions, but also the connection method. The tubes can be arranged symmetrically or asymmetrically, have different diameters (6.35 mm, 8 mm, etc.). Universal evaporators often sold with a reserve length of tubes that can be carefully trimmed or, conversely, extended if necessary.
The table below shows helping to navigate popular series and possible replacements. Remember that this is only indicative data, and size verification is required.
| Original (Brand) | System type | Possible analogue | Selection features |
|---|---|---|---|
| Indesit / Ariston | No Frost | ALFA, CRH | Trimming of the pallet is often required |
| Samsung | No Frost | Original / Koolman | The location of the heating element is important |
| LG | No Frost | Original / (Universal) | Specific fastening fan |
| Atlant | Crying | Factory Atlant | Strictly according to the dimensions of the back wall |
The use of universal components allows you to significantly save the repair budget without loss of quality if you choose the right dimensions. However, for complex systems with a double cooling circuit (for example, Multi Air Flow) it is better to look for original spare parts or their high-quality copies.
⚠️ Attention: The characteristics and availability of spare parts may vary depending on the current production program of the factories. Before making a final purchase, always check the article number and dimensions with the data in the supplier’s catalog or on the manufacturer’s official website.
Installation and connection nuances
Replacing an evaporator is not only a mechanical job, but also a complex technological process that requires special equipment. After installing a new part, it is necessary to evacuate the system to remove moisture and air. Residual moisture in the circuit will lead to the formation of an ice plug and failure of the compressor in the shortest possible time.
When installing, make sure that the tubes do not bend and do not touch the sharp edges of the housing. Soldering copper-aluminum connections (if you use a copper outlet on an aluminum evaporator) requires the use of special solders and fluxes, since the usual It is impossible to combine these metals with tin. Adapter bushings are often used.
After filling the refrigerator with freon, you need to check the tightness of all connections with a soap solution. It is also important to properly secure the defrost heating element and temperature sensors if they have been removed. Poor installation of thermal paste or lack of thermal contact between the sensor and the evaporator tube will lead to incorrect operation of the refrigerator.
Do not rush to assemble plastic and panels until the system is fully tested. Let the refrigerator operate for several hours to make sure there is no extraneous noise and the defrosting cycle is correct.
Frequent errors during selection and installation
One of the most common mistakes is ignoring the shape of the water tray. If the new evaporator has a flat bottom, and the old one had gutters, water will flow past the drainage hole, causing icing on the bottom of the freezer and leakage onto the floor. Tray geometry must match the original or be adapted by the master.
Another mistake is using a smaller evaporator. If you install a part from a smaller refrigerator, the compressor will run non-stop, trying to get the temperature up. This will lead to overloading of the motor, increased energy consumption and rapid wear of the unit. Performance must correspond to the volume of the chambers.
Also, they often forget to replace the filter-drier when opening the circuit. The old filter is already saturated with moisture and will not be able to protect the system from a new portion of moisture that entered during installation. This is a direct road to repeated repairs in a few months.
Avoid using aggressive chemicals to clean a new evaporator before installation. Aluminum easily reacts with alkalis and acids. Wipe the part only with a dry cloth or special means for cleaning heat exchangers.
Final recommendations for selection
Selecting an evaporator is a task that requires care and precision. You should not rely on “maybe” or advice from neighbors, since each refrigerator is unique in its design. The best way is to dismantle, measure and compare with catalog data. If you are not confident in your abilities, it is better to entrust this work to a professional technician with equipment for vacuuming and filling.
A high-quality replacement will extend the life of your refrigerator for another 10-15 years. Remember that proper operation of the cooling system is the key to the safety of your products and the health of your family. Choose trusted suppliers of spare parts and do not chase the lowest price at the expense of the quality of the metal.
Is it possible to fix a hole in the evaporator?
Theoretically, you can solder the fistula, but in practice this is a temporary solution. The solder joint on thin aluminum often becomes the center of new corrosion. In addition, it is difficult to find the location of the leak without special equipment. Replacing with a new unit is the only reliable solution.
FAQ: Frequently Asked Questions
Is it possible to install an evaporator with a larger area than the original?
Installing an evaporator with a larger heat transfer area will theoretically improve cooling, but may upset the balance of the system. The compressor may begin to operate in a short cycle (turning on and off frequently), which is harmful to its service life. There may also be problems with placing the part in the limited space of the chamber.
What is the difference between an evaporator for a refrigerator with one compressor and a two-compressor one?
In two-compressor systems there are usually two separate evaporators: one for the freezer, the other for the refrigerator. They have different sizes and operating temperatures. The evaporator for the “refrigerator” (upper chamber) is usually smaller and operates at positive temperatures, while the freezer evaporator is powerful and operates in deep minus.
Why does the new evaporator not cool immediately after installation?
Most likely, there is air or moisture left in the system, or the amount of freon charged is incorrect. The cause could also be a solder leak. The refrigerator needs time (up to 24 hours) to stabilize the temperature after the first turn on, but if there is no cold at all, there is an installation error.
Is it necessary to change the oil in the compressor when replacing the evaporator?
If the leak occurred recently and the compressor did not run idle for a long time, an oil change is not required. However, if there is a suspicion that acid has entered the system (for example, when the compressor winding burned earlier), then flushing the system and changing the oil are mandatory, otherwise the new evaporator will quickly fail.
Where can I find the markings on the evaporator?
The markings are often applied to the aluminum plate itself or glued to paper sticker, which may peel off or wear off over time. Sometimes the article number is indicated on the packaging box. If there is no marking, the only way to identify is by taking dimensions and visually comparing the shape.