The situation when the refrigerator Samsung stops cooling, and an ice “coat” grows on the back wall of the freezer, often indicates a breakdown of the defrost system. In systems No Frost a special heating element, the heating element, is responsible for defrosting the evaporator. If it burns out, the ice stops melting, air circulation is blocked, and the temperature in the chambers rises. Diagnostics of this part is the first step before expensive repairs or calling a specialist.
Checking the heating element does not require complex equipment, just a basic set of tools and an understanding of the principles of operation of the electrical circuit. Multimeter will become your main assistant in determining the integrity of the heating coil. It is important to understand that incorrect diagnostics can lead to false conclusions, so it is necessary to strictly follow the sequence of actions and safety measures when working with electrical appliances.
In this article we will look at how to correctly remove the heater, set up the measuring device and interpret the readings. You will find out which resistance values are considered normal for various models Samsung, and which indicate a breakdown or break. We will also touch on adjacent elements of the defrost system, which often fail simultaneously with the heater.
The principle of operation and signs of a heating element malfunction
The heating element in refrigerators Samsung is a nichrome spiral enclosed in a metal tube filled with a dielectric filler. It turns on by command control module or defrost timer several times a day to melt the frost that has collected on the evaporator. If the heating element does not work, the defrosting process stops and the ice begins to block the ventilation ducts.
You can understand that the problem lies in the heater by a number of indirect signs even before disassembling the unit. The refrigerator may hum as usual, the compressor may operate normally, but the temperature in the main chamber will be higher than normal. In the freezer, there may be a heavy snow deposit on the food or the back wall.
⚠️ Attention: If you find that the refrigerator turns on often, but does not get cold, do not rush to change the heating element. First, make sure that the defrost sensor is working properly, since it is the one that gives the command to turn on the heating. Replacing the heater with a working sensor will not solve the problem.
The main symptoms of failure defrost heater include:
- ❄️ Formation of thick ice crust on the back wall of the freezer.
- 🌡️ Increase in temperature in the refrigerator compartment when the compressor is running.
- 💧 The appearance of a puddle of water under the refrigerator due to the drain pan overflowing with melted ice (cyclically).
- 🔇 Lack of characteristic crackling or hissing sound during the defrost cycle.
Diagnostics begins with a visual inspection. If, after completely defrosting the unit (at least 24 hours when switched off), the cooling problem returns after a few days, and there is ice on the evaporator again, the probability of a malfunction of the heating element is extremely high. However, for accurate confirmation it is necessary to “ring” the part.
Necessary tools and safety measures
Before starting any work on repairing household appliances, you must ensure your safety and prepare the workplace. Working with electricity and accessing the internal components of the refrigerator require caution. The first and most important step is to completely disconnect the device from the electrical network.
To carry out diagnostics, you will need a minimum set of tools. The main device will be multimeter (tester), which can be purchased at any electrical goods store. It will allow you to measure the resistance of the circuit and check for a breakdown on the housing. Without this device, accurate diagnostics is impossible.
Also for accessing the heating element in refrigerators Samsung with the system No Frost you will need:
- 🔧 Phillips screwdriver (size PH2 is often required) to remove the panels.
- 🧤 Protective gloves to avoid getting hurt by the sharp metal edges of the evaporator.
- 🔦 Flashlight for illuminating hard-to-reach places inside the freezer.
- 🧊 Hairdryer (construction or household) for carefully defrosting ice if access to the heating element is blocked.
Do not forget that there may be fragile plastic elements and sensitive electronics inside the refrigerator. Sudden movements or force when removing panels may cause the latches to break. Proceed smoothly, carefully examining the fastenings.
⚠️ Attention: It is strictly forbidden to check the refrigerator plugged into the outlet with a multimeter. All manipulations with electrical circuits are performed only on completely de-energized equipment to avoid electric shock or short circuit.
Removal and access to the heating element
In refrigerators Samsung The defrost heating element is usually located in freezer compartment, hidden behind the back panel. The design may vary slightly depending on the model (Side-by-Side, two-chamber, three-chamber), but the general principle of access is similar. First you need to empty the freezer of food and remove all shelves and drawers.
The next step is to remove the rear plastic panel. It is attached with screws, which can be hidden under decorative plugs, and with plastic latches. Carefully remove the visible screws, then, starting at the bottom corner, carefully unclip the panel around the perimeter. Under it you will see evaporator and a heating element located nearby.
Often access to the heating element is difficult due to frozen ice. If the ice crust hides the mounting points or wires, do not try to pry it off with a knife or screwdriver - there is a high risk of damaging the evaporator tubes or the heater itself. Use a hairdryer to gently melt the ice or leave the refrigerator open for several hours.
How to remove the heating element if it is frozen?
If the heating element is frozen to the evaporator, do not pull it by the wires. Gently pour warm water from a syringe or bottle over the mounting area to melt the ice plug, and only then remove the part.
The heating element itself is a curved tube, often U-shaped or W-shaped, which can be inserted into special grooves in the evaporator or attached to it. To remove:
- 🔌 Disconnect the wire connectors going to the heating element (usually there are two of them).
- 🔩 Unscrew the screws securing the heater to the evaporator body or brackets.
- 📏 Carefully remove the element, trying not to deform it tube.
After removal, carefully inspect the heating element. There should be no swelling, cracks or signs of obvious thermal damage. However, a visual inspection does not guarantee serviceability, so we move on to an instrumental check.
Setting up the multimeter and checking for a break
To check the heating element, the multimeter must be switched to resistance measurement mode. On most devices this mode is indicated by the symbol Ω (Ohm). If your tester has autoranging, simply select this mode. If manual, set the limit to 2 kOhm (2000 Ohm).
Before measurement, check the serviceability of the multimeter probes by shorting them together. The device should show a value close to zero and emit a sound signal (if the dial tone is enabled). This will confirm that the instrument is ready for use.
The process of checking for a break (integrity of the spiral) is as follows:
- Connect the multimeter probes to the contacts of the heating element. Polarity in this case is not important, since we are checking the active resistance.
- Follow the readings on the display. If the spiral is intact, you will see a specific numerical value of resistance.
- If the unit on the left (or the infinity symbol OLlights up on the screen), this means an open circuit. The heating element has burned out and requires replacement.
The normal resistance of a working heating element of the refrigerator Samsung usually ranges from 200 to 400 Ohm. The exact value depends on the heater power and may vary. The main thing is the presence of a finite number, not infinity.
☑️ Check with a multimeter
If the resistance is significantly lower than normal (for example, 10-50 Ohms), this may indicate interturn short circuit, although this is rare for heating elements in refrigerators. Most often, the malfunction is a complete break.
Diagnostics of a breakdown on the case
Checking for a break is not the only test. It is extremely important to make sure that no breakdown to the body. This is a situation where the insulation inside the tube is broken and the coil comes into contact with the metal shell. Such a heating element can formally “ring” (show resistance), but when turned on it will knock out circuit breaker (RCD) in the apartment or give an electric shock when touching the body of the refrigerator.
To check the breakdown switch the multimeter to diode test mode or leave it in resistance measurement mode at the maximum limit (2 MOhm and higher). Press one probe to the contact terminal of the heating element, and the second to the metal body of the heating tube.
In good condition, the device should show infinity (one in the most significant digit or OL). If you see any resistance values (for example, 50 kOhm, 100 kOhm) or hear a continuity squeak, it means that the insulation is broken.
⚠️ Attention: Operating a refrigerator with a heating element that has a breakdown in the body is deadly! Even if the RCD does not trip yet, the risk of electric shock when touching the metal parts of the refrigerator is extremely high. Such an element must be replaced immediately.
Sometimes a breakdown can only appear when heated. If the heating element is visually intact, the resistance is normal, but the RCD trips periodically during operation of the refrigerator, it is better to replace the heater preventively, since a microcrack in the insulation could have already formed.
Summary table of values and codes errors
For ease of diagnosis, the main parameters and possible measurement results are summarized in a table. Please note that resistance values may vary slightly depending on the temperature of the element (cold or warm).
It is also worth considering that modern refrigerators Samsung are equipped with a self-diagnosis system. A heating element malfunction is often displayed on the display as an error code. For example, series codes 11E, 12E, 13E, 14E, 15E, 16E or 21E, 22E etc. (depending on the model) may indicate problems with the sensors or the defrost heater.
| Check parameter | Normal value | Fault symptom | Action |
|---|---|---|---|
| Spiral resistance | 200 - 450 Ohm | ∞ (Infinity) or 0 | Replacing the heating element |
| Breakage to the body | ∞ (Infinity) | Any numerical value | Urgent replacement |
| Visual inspection | Smooth tube without swelling | Cracks, swelling, melting | Replacement of the heating element |
| Integrity of wires | 0 Ohm (continuity) | Open circuit in the wires | Restoring the wiring |
If the measurements showed normal, but the refrigerator does not defrost, the problem may not be in the heating element, but in defrost sensor (thermostat) or fuse. These elements are also in the circuit and are tested in the same way. The fuse should ring short (0 Ohm), and the defrost sensor should change resistance depending on the temperature.
When replacing the heating element, it is recommended to change the fuse, even if it is working, since its lifespan could have been exhausted by a power surge, which led to the breakdown of the heater.
Frequently asked questions and answers (FAQ)
Is it possible to temporarily operate a refrigerator without a heating element?
Technically, the refrigerator will work, but only in manual defrost mode. You will have to regularly (once every 1-2 weeks) completely defrost the unit by turning it off for 24 hours. If you forget to do this, the ice will block the channels and the refrigerator will stop freezing. Long-term operation in this mode is harmful to the compressor.
Why does a new heating element burn out immediately after installation?
Most often the reason lies in a faulty defrost sensor. If it is “stuck” in the “on” position, the heating element will heat constantly until it burns out or the fuse trips. Always check the entire defrost circuit, not just the heater.
Where can I find the exact diagram for my Samsung model?
Diagrams and technical data sheets (service manual) are usually located on the back wall of the refrigerator (in some older models) or are available on official support portals for the full model code (for example, RB30J3200WW). Diagrams can also be found in specialized databases for repairing household appliances.
How to distinguish an original heating element from an analogue?
Original spare parts Samsung are marked with a logo and part code (starts with DA, for example, DA47-00123A). Analogues may have a different terminal shape or wiring length, which will require modifications during installation. It is recommended to buy originals or proven substitutes (for example, Almi, Finlux).
Do you need to lubricate the contacts of the heating element during installation?
You cannot use ordinary lubricants. To protect contacts from oxidation in conditions of humidity and low temperatures, you can use a special electrically conductive or heat-resistant lubricant, but it is better to simply ensure a tight connection and reliable insulation of the joints.