If you are faced with the fact that your Samsung stopped freezing, but the motor is humming, and A thick layer of ice has formed on the back wall of the freezer, most likely the problem lies in the No Frost system. In such situations, the first suspect is often the heating element, or simply the heating element. It is responsible for regular thawing of the evaporator, preventing it from becoming fouled with a “fur coat.”
Understanding where exactly this unit is located is half the success when doing self-repair. Unlike older models with manual defrosting, in modern units with the system No Frost access to the heater is hidden behind decorative panels and layers of thermal insulation. You will have to partially disassemble the freezer to get to the hidden mechanisms.
Don't panic if you see an ice monolith inside the chamber. This is a normal situation when there is a defrost malfunction. In this guide, we will analyze in detail the design of refrigerators Samsung, indicate the exact location of the heating element depending on the series and help determine whether it is really to blame, or whether the problem lies deeper in the control electronics.
⚠️ Attention: Before starting any work on disassembling and diagnosing electrical components, be sure to disconnect the refrigerator from the power supply. Working with live wiring is deadly and can lead to failure of the control board.
The principle of operation of the defrost system in Samsung
To effectively troubleshoot, you need to understand how the unit works. In refrigerators Samsung with a system No Frost cold air circulation is forced. The air is cooled by passing through the evaporator, which is hidden inside the housing. Over time, moisture from the food settles on the cold evaporator tubes in the form of frost.
If this frost is not removed, it will turn into an ice block that will block the air flow channels. This is exactly why it is needed Defrost heating element. A signal from a timer or electronic control module turns on the heater, which melts the ice. The resulting water flows into a special tray and evaporates.
The defrosting process is controlled by several sensors. One of them, defrost sensormonitors the temperature of the evaporator. When the ice melts and the temperature rises above a certain threshold, the sensor gives a command to turn off the heating element. If the circuit is broken or the heater itself burns out, the ice does not melt, the fan stops moving air, and the refrigerator stops cooling food.
The exact location of the heating element in different models
The structural location of the heating element in refrigerators Samsung has its own characteristics. In most models with a bottom freezer (RB, RL, RS series), the heating element is located directly in the freezer compartment. It is hidden behind the rear plastic panel.
In two-chamber models such as Side-by-Side or French Door, the design may differ. Here, the evaporator and heating element are also most often located in the freezer compartment, but access to them may be difficult due to the presence of additional air ducts or an ice maker. In some older models Samsung there is a lower location of the heating element surrounding the lower part of the evaporator, but in modern units an aluminum heater inserted into the grooves of the radiator dominates.
To access the unit you will need to completely empty the freezer of food, remove all shelves and drawers. Then the back wall is dismantled. It is behind it, on the aluminum evaporator radiator, that it is fixed heating element. It may look like a curved tube or a rectangular plate, depending on the year and model.
Step-by-step instructions for dismantling the rear panel
It is impossible to get to the heating element without removing the rear panel. This process requires care, since the plastic in refrigerators Samsung becomes brittle in the cold. If you try to remove the panel by force without warming it up or without removing all the fasteners, you can break the latches.
You must first remove all visible screws. They can be hidden under decorative plugs or rubber shelf legs. In some models, screws secure not only the panel itself, but also the drawer guides. After unscrewing all the screws, the panel is still held in place by plastic latches around the perimeter.
Carefully pry the panel with a plastic card or a special spatula. Do not use metal screwdrivers to avoid damaging the insulation or casing. If the panel does not come off, it may be frozen. In this case, you can use a hairdryer to slightly warm up the perimeter, or simply wait until the refrigerator is completely defrosted naturally.
☑️ Algorithm for accessing the heating element
When the panel is removed, your view will reveal an aluminum evaporator radiator. The heating element can be built into special grooves of this radiator or attached to it from below. Wires will go to it, often protected by corrugation or heat-resistant insulation.
Diagnostics and checking the serviceability of the heating element
Before buying a new part, you need to make sure that this is the problem. A visual inspection may not yield results: a burnt heating element often looks intact in appearance. For accurate diagnostics, you will need a multimeter.
Switch the multimeter to resistance measurement mode (Ohms). Disconnect the heating element connector from the refrigerator wiring. Touch the probes to the contacts of the heating element. If the screen displays a value in the range from 200 to 400 Ohms (depending on the power), then the circuit is intact. If the device shows one or infinity, the circuit is broken and the heating element is burned out.
| Symptom | Probable cause | Multimeter reading |
|---|---|---|
| The refrigerator does not freeze, there is ice on the evaporator | The defrost heating element is burnt out | Infinity (break) |
| The refrigerator is working normally | The heating element is working | 200–400 Ohm |
| Knocks out plugs when turned on | Breakdown of the heating element to the body | Resistance between the contact and the body (should be ∞) |
It is also worth checking the integrity of the wires going to the heating element. It often happens that the heater itself is intact, but the wiring is frozen or chewed. Ring the circuit from the connector to the contacts of the heating element. If there is no resistance, look for a break in the wiring harness.
⚠️ Attention: If you find that the heating element is breaking through to the body (the multimeter shows the resistance between the contact and the aluminum radiator), it is dangerous to operate such a refrigerator. This may result in an electric shock when touching metal parts.
Replacing the heating element and assembling the refrigerator
If diagnostics confirm a malfunction, the element must be replaced. Refrigerators Samsung use original heating elements or high-quality analogues. Installing a cheap Chinese copy of dubious quality can lead to rapid repeated failure or even a fire.
Remove the old heating element. It can be attached to clips or simply inserted into grooves. Be careful: the aluminum evaporator core is very soft. If you damage it, you will break the tightness of the system, and repairs will become economically unfeasible. Install the new heater in the same grooves, being careful not to use excessive force.
Connect the connectors. Make sure the connection is tight and the contacts are not oxidized. If there are signs of corrosion on the connectors, clean them. After installation, reassemble the structure in the reverse order: install the back panel, fasten the screws, return the shelves and drawers.
Is it necessary to change the defrost sensor along with the heating element?
If the heating element is burned out, this does not always mean that the sensor is broken. However, if the sensor is “stuck” in the “on” position, the heating element could operate continuously and burn out. It is recommended to check the sensor: at room temperature, its contacts should be open (if it is normally closed) or closed (if it is normally open), depending on the type. If in doubt, it is better to replace both elements, since they are inexpensive.
After assembly, turn on the refrigerator. During the first hours of operation, it may work longer than usual, gaining temperature. Do not load the chamber with products immediately, let the system go into operation.
Typical errors and fault codes
Modern refrigerators Samsung are equipped with a self-diagnosis system. If the heating element does not work, a combination of indicators or an error code may light up on the display. Most often these are series codes 12E, 14E, 16E or 18E (Error Freeze Sensor/Defrost). The exact decoding depends on the model.
A common mistake during repairs is ignoring the drainage system. Even if you replace the heating element, make sure that the water drain hole is not clogged with debris or ice. If the water has nowhere to go, it will freeze at the bottom of the chamber and can damage the new heater or cause corrosion.
Another common mistake is using the wrong insulation materials. If you replace wiring, use only heat-resistant wires. Regular insulation will melt when heated, resulting in a short circuit.
Do not forget that design details may vary slightly depending on the year of manufacture. Always check the technical documentation of a specific model, if available, especially when selecting the length and power of the heating element.
Is it possible to temporarily operate a refrigerator without a heating element?
Technically, the refrigerator will work, but only until the evaporator is completely covered with ice. This may take from 2 to 5 days. After this, the air circulation will stop and the refrigerator compartment will stop cooling. Constant operation in this mode will lead to overload of the compressor.
Why does the refrigerator make strange sounds after replacing the heating element?
When heated and cooled, metal and plastic parts expand and contract, which can cause a cracking sound. This is fine. However, if you hear a hum or knocking, check whether the heating element or wires are touching the fan blades.
Which heating element is better: tubular or aluminum?
In the original Samsung aluminum tape heating elements are more often used, which are inserted into the grooves. They transfer heat more efficiently. Tubular analogues sometimes require the use of thermal paste for better contact. It is better to install what is provided for by the design.
How long does defrosting take after replacement?
If you did not wait for complete natural defrosting before repair, after switching on it may take up to 24 hours to stabilize the temperature and dry out the residual moisture in the insulation.