Checking the heating element for defrosting a Samsung refrigerator: step-by-step algorithm

The appearance of an ice “coat” on the back wall of the refrigerator compartment or a complete absence of cold often indicates a failure in the No Frost system. In most cases, the culprit is heating element, which has ceased to perform its function of evaporating condensate. Refrigerators of the brand Samsung are known for their reliability, but even they are subject to wear of parts, especially if the unit has been in operation for several years without preventive maintenance.

Before calling a technician or buying a new part, it makes sense to carry out independent diagnostics. Multimeter is a universal device that allows you to accurately determine the integrity of an electrical circuit. If you are ready to carefully disassemble the freezer and follow safety precautions, then the check will take no more than 30-40 minutes of your time.

In this article we will analyze in detail the process of removing and testing the heater, we will explain which readings of the device are considered normal and which indicate a breakdown. You will learn how to distinguish a burnt heating element from other malfunctions of the defrost system, such as failure of the timer or temperature sensor.

Symptoms of a malfunction of the defrost heater

You can understand that the problem lies precisely in the defrost system by characteristic external signs. When Evaporator heating element burns out, the defrosting process stops and ice begins to accumulate on the radiator behind the rear panel. Over time, the ice mass blocks the air circulation channels, which is why the cold stops flowing into the main chamber, although the compressor continues to work without interruption.

Pay attention to the following manifestations:

• 🧊 On the back wall of the fridge compartment or in the corner of the freezer, a thick layer of ice or frost that does not melt.
• ❄️ The temperature in the chambers rises, food begins to deteriorate, although the thermostat is set to maximum.
• 🔊 The compressor hums almost non-stop, trying to compensate for the lack of cold.
• 💧 Under the refrigerator or inside puddles of water appear on it (below) when the ice begins to melt naturally or when the doors are opened.

⚠️ Attention: If you notice that the refrigerator is working in high mode, but is not freezing, do not try to chip the ice with a knife or other sharp objects. This can lead to damage to the evaporator tubes and leakage of freon, which will make repairs economically unfeasible.

Sometimes a visual inspection through the grille in the freezer already shows the presence of ice conglomerate around the heater. However, a final diagnosis can be made only after instrumental testing resistance. It is important not to confuse the breakdown of the heating element with a malfunction of the defrost sensor, which can prematurely turn off the heating, even if the element itself is working.

Preparation for diagnostics and safety precautions

Any work related to electricity and disassembling household appliances requires strict adherence to safety precautions. The refrigerator Samsung must be completely disconnected from the power supply. Simply turning off the button on the control panel is not enough - you need to unplug the cord from the outlet. This will eliminate the risk of electric shock and protect the electronic control board from power surges when manipulating the contacts.

To carry out diagnostics, you will need the following set of tools:

• 🔧 Phillips and flat-head screwdrivers for removing panels and fasteners.
• 🔌 Digital multimeter (tester) for measurement resistance.
• ✂️ Pliers or side cutters (in case you need to clean the contacts, although connectors are usually used in Samsung 🔦 Flashlight for better illumination of the interior of the freezer.
• 🔦 Flashlight for better illumination of the interior of the freezer.

Before starting disassembly, it is recommended to let the unit stand unplugged for at least 1-2 hours so that the ice partially melts, if there is a lot of it. This will make removing the panels easier. It is also worth preparing a container for collecting water and a rag, since condensation may leak when dismantling the evaporator. It is better to work in good lighting to see the condition of the wires and connectors.

Access to the heating element: disassembling the freezer compartment

In refrigerators Samsung with the No Frost system, the heating element is located behind the back wall of the freezer. Access to it is blocked by a plastic panel, which is secured with screws and plastic latches. In some models, for example, series RB30 or RL34, the design may differ slightly, but the general principle remains the same.

The disassembly process is as follows:

1. Remove all drawers and shelves from the freezer.
2. Find and unscrew the mounting screws on the side walls and top of the rear panel. They can be hidden under decorative plugs.
3. Carefully bend the plastic clips around the perimeter of the panel. Proceed with caution, as in the cold the plastic becomes brittle and may crack.
4. Remove the panel by pulling it towards you. Be careful: wires from sensors or a fan may be connected to the panel.

⚠️ Attention: The design of plastic latches in refrigerators Samsung often requires careful bending with a spatula. Do not use excessive force so as not to break the fasteners, otherwise the panel will not fit tightly after assembly, which will lead to whistling and additional freezing.

After removing the panel, the aluminum evaporator radiator will be revealed to your view. On the lower part of this radiator, under the pipes, it is located heating element. It may appear as an open coil in a quartz tube or be sealed in a metal casing. Wires protected by heat-resistant insulation come to its ends.

Design features of Samsung heating elements

Samsung refrigerators often use tubular heaters, curved to the shape of a radiator. They are inserted into special grooves or secured with staples. When replacing, it is important not to damage the aluminum tubes of the evaporator, since their repair requires special equipment and hard soldering.

Algorithm for checking with a multimeter

The most important stage is the direct measurement of resistance. To do this, switch the multimeter to resistance measurement mode (denoted as Ω or "Ohms"). Select the measurement limit in the range of up to 2000 Ohm (2 kOhm) or 20 kOhm, depending on the device model. If you do not know the rating of your heating element, start with a larger range.

Follow these steps:

• 🔌 Disconnect the connector with the wires going to the heating element. In some models Samsung the wires may be twisted and insulated, then they need to be carefully disconnected.
• 📏 Attach the multimeter probes to the heater contacts. Polarity in this case does not matter.
• 👀 Follow the readings on the device screen. The numbers should stabilize within 1-2 seconds.

The normal resistance of a working heating element with a power of 150-250 W (standard for household refrigerators) is usually in the range from 200 to 400 Ohm. The specific value depends on the power of the element and the voltage in the network. If the multimeter shows one (infinity) or "OL" (Over Limit), this means open circuit the heater has burned out and requires replacement.

It is also necessary to check the breakdown on the housing. Switch the multimeter to the “dialing” mode (with the speaker icon) or measuring resistance to the maximum limit. Touch the heating element contact with one probe, and its metal tube or body with the other. The device should be silent and the screen should show infinity. If there is a squeak or numbers appear, it means that an insulation breakdown has occurred. It is dangerous to operate such an element. depressurization and insulation breakdown. It is dangerous to operate such an element.

Table of typical resistance values

For ease of diagnosis, we provide a table with approximate resistance values ​​for heaters of different powers, which are often installed in refrigerators Samsung. Remember that actual values may differ slightly due to the temperature of the metal and the error of the device.

If your measurements coincide with the first three lines of the table, then the electrical circuit of the heater is intact. In this case, the reason for the lack of defrosting may lie in other components: timer, temperature sensor or control module. If the readings correspond to the two lower lines, the part must be replaced.

What to do if the heating element is faulty

Detection of a break or breakdown in the body means that the part cannot be restored. The heating element is a consumable item and replacing it is the only solution. Refrigerators Samsung often use original heating elements, but the market offers many high-quality analogues that are suitable in geometric dimensions and power.

When purchasing a new part, pay attention to:

• 📏 Overall dimensions and bend shape of the tube (must match the original).
• ⚡ Power (W) and operating voltage (V).
• 🔌 Type and length of wires, as well as the location of contacts.

⚠️ Attention: When installing a new heating element, make sure that it fits tightly to the surface of the evaporator. Gaps between the heater and radiator reduce the efficiency of heat transfer, causing defrost to take longer or not completely, which will again lead to ice fouling.

The installation process is performed in reverse order. Carefully insert the new element into the grooves, connect the wires (maintaining insulation of the connections), install the back panel and secure it with screws. After assembly, plug in the refrigerator and check its operation. The first defrost cycles may be delayed until the system synchronizes.

Sometimes it is recommended to change the heater together with the heating element defrost sensor, since it also works in extreme conditions and can produce errors over time. However, if the diagnostics showed that the sensor is working properly (its resistance changes depending on the temperature), there is no need to replace it.

Is it possible to temporarily operate a refrigerator without a heating element?

Theoretically, the refrigerator will freeze, but very soon the evaporator will be covered with ice, blocking airflow. This will lead to overheating of the compressor and failure. Long-term operation without a working defrost system is prohibited.

Why does the defrosting heating element burn out?

The main reasons: natural wear of the spiral, power surges, mechanical damage during previous defrosts or moisture getting on the contacts, which causes corrosion and short circuit.

Is it necessary to defrost the refrigerator before replacing the heating element?

Yes, complete defrosting is required. If you change the heating element on an iced-up evaporator, you can damage the aluminum tubes when dismantling the old part, and the new one will work ineffectively.

Which multimeter is better to use?

Any entry-level digital multimeter is suitable for household diagnostics. The main thing is that it has a function for measuring resistance (Ohm) and circuit integrity (continuity).