Modern refrigeration units of the South Korean company Samsung are deservedly popular thanks to the technology No Frostwhich relieves owners of the need manual defrosting. However, even the most reliable equipment breaks down over time, requiring the intervention of a specialist or self-repair. Most often, problems arise in the freezer compartment, where the air stops cooling or, conversely, excessive ice builds up.
To diagnose and replace faulty components, such as Defrost heating element or temperature sensor, you need to gain access to the evaporator hidden behind plastic panels. The disassembly process does not require supernatural skills, but it is critical to follow the sequence of actions so as not to damage the fragile plastic latches and not to break the tightness of the system.
In this article we will analyze in detail the algorithm for dismantling the internal elements of refrigerators Samsung with No Frost system. You will learn what tools are needed, how to safely remove the back wall and what to look for when inspecting the defrost system. The main cause of breakdowns in 80% of cases is the failure of the defrost heating element or sticking relay contacts.
Preparation of the workplace and the necessary tools
Before you begin dismantling, it is necessary to free up space in front of the refrigerator. You will need access to the rear of the unit, so move the equipment at least 50-70 centimeters away from the wall. Make sure the floor is level and clean so that the laid out parts will not get damaged or get lost. Any haste at the beginning of the process can lead to breakage of the fasteners.
For the work you will need a standard home craftsman's kit. The main tool will be a Phillips screwdriver, preferably with a magnetic tip, since screws are often located in hard-to-reach places. It would also be useful to use a flat spatula or a plastic spatula to open the latches so as not to scratch the plastic of the case.
List of necessary tools:
- 🔧 Phillips screwdriver (sizes PH1 and PH2)
- 🔨 Flat screwdriver or plastic spatula
- 💡 Flashlight for illuminating the internal space
- 🧤 Gloves to protect your hands from sharp ice edges
Carefully inspect the inner surface of the chambers before starting to unscrew. The lack of the necessary tool can lead to broken bolt heads, which will significantly complicate assembly.
⚠️ Attention: Before starting any disassembly work, be sure to disconnect the refrigerator from the electrical network! Working with electrical appliances under voltage is deadly.
☑️ Preparation for disassembly
Dismantling the shelves and internal elements of the freezer
Disassembly begins with freeing up the internal space. In refrigerators Samsung with the No Frost system, access to the evaporator is usually through the back wall of the freezer. First, remove all drawers, shelves, and egg trays. Be careful: plastic becomes brittle at low temperatures and can crack from careless movement.
After removing the drawers, pay attention to the side guides. In some models they are attached with latches, in others they are simply inserted into the grooves. Gently pull the guides towards you to remove them. This will give you access to the rear panel mounting screws. Sometimes the screws can be hidden under white plastic plugs, which can be easily removed with the tip of a knife or flat-head screwdriver.
Pay special attention when removing the ice maker if it is built into the chamber. If your unit is equipped with a Twice Ice or similar system, you will need to disconnect the water supply hose and electrical connector. Do not pull the wires - find the connector lock and press it before removing.
Common mistakes when dismantling internals:
- ❌ Using force when removing shelves
- ❌ Ignoring hidden screws under stickers
- ❌ Sudden movements when disconnecting the wires
Nuances of removing the ice maker
In models with automatic water supply inside the chamber, it is often necessary to remove the top cover of the ice maker by unscrewing 2-3 screws. Only after this is access to the places where the main body is attached to the chamber wall.
Removing the rear panel and access to the evaporator
This is the most critical stage that requires care. The back panel in refrigerators Samsung is usually secured with 4-6 screws around the perimeter. However, the main difficulty is the presence of plastic latches on the sides and bottom of the panel. Simply unscrewing the screws and pulling the panel may break these fasteners.
Use a plastic spatula or flathead screwdriver wrapped in cloth to gently pry the panel loose around the perimeter. Move from bottom to top, gradually releasing the latches. The panel may fit tightly due to freezing, so do not make sudden movements. If the panel does not budge, there may be a loose screw somewhere or wiring is interfering.
Behind the rear panel you will see an aluminum evaporator, similar to a car radiator, and a fan. This is where the air is cooled, which is then pumped into the chamber. In the same space there are Defrost heating element (heating element), defrost sensor and a trench for condensate drainage.
Technical characteristics of units defrost:
| Component | Function | Location | Frequent malfunction |
|---|---|---|---|
| Defrost heating element | Heating evaporator | At the bottom of the evaporator | Broken spiral |
| Defrost sensor | Temperature control | On the evaporator fins | Change in resistance |
| Fan | Air circulation | Top or side | Bearing wear |
| Relay defrosting | Switching the heating element | On the back wall (outside) | Sticking contacts |
⚠️ Attention: The plastic of the rear panel becomes extremely brittle in the cold. If the refrigerator has just been defrosted, let the plastic warm up to room temperature before removing it, otherwise the risk of cracks is close to 100%.
Diagnostics and replacement of defrosting system elements
After removing the panel, it is often discovered that the evaporator is covered with a thick layer of ice, although externally the refrigerator could work. This is a sure sign of a defrost system malfunction. Ice blocks the air flow and the cold stops flowing into the main chamber. The first step is to completely defrost the unit, leaving it turned off for 12-24 hours.
After defrosting, proceed with a visual inspection of the heating element. It is a tube passing through the bottom of the evaporator. Check its integrity with a multimeter: the resistance of a working heating element with a power of 200-250 W should be approximately 200-280 Ohms. If the device shows a break (one on the screen) or zero, the element requires replacement.
To replace the heating element in some models Samsung you need to remove the entire evaporator, in others you just need to bend the fasteners. The temperature sensor (defrost thermostat) is usually attached to one of the evaporator tubes or inserted into a special hole. Its resistance at room temperature is about 5-7 kOhm, and when it freezes it increases sharply.
Algorithm for testing with a multimeter:
- 🔋 Switch the device to resistance measurement mode (Ohm)
- 🔌 Disconnect the terminals from the element being tested
- 📏 Attach the probes to the contacts and record the readings
- 🔍 Compare the result with the nominal values for your model
Replacing the fan and eliminating noise
If the refrigerator hums, howls or makes extraneous vibration sounds, the problem often lies in fan located behind the rear panel. In No Frost models, it is responsible for forced circulation of cold air. Over time, the lubricant in the bearings dries out, or ice builds up on the blades, disrupting the balancing.
To replace, remove the fan from the mounts. It is usually held on by two or four screws and connected via a connector. Before installing a new unit, check that the impeller rotates freely by hand. Also inspect the air ducts for the presence of foreign objects - sometimes pieces of packaging or ice get there.
It is important to install the fan correctly, observing the direction of the airflow. Usually an arrow on the housing indicates the direction of rotation. If you reverse the polarity when connecting (which is rare, but possible when re-soldering), the motor will spin in the opposite direction and there will be no cooling.
Signs of a fan malfunction:
- A loud hum or howl that increases over time.
- The refrigerator works, but does not cool (the air does not circulates).
- The fan stops periodically or rotates jerkily.
⚠️ Attention: When installing a new fan, make sure that the wires do not get under the blades. Vibration can lead to chafing of the insulation and a short circuit.
Assembling and initial start-up of the refrigerator
Assembly is done in the reverse order disassembly Install the back panel, making sure that all latches click into place. Tighten all the screws evenly without overtightening them to avoid stripping the threads in the plastic. Connect the electrical connectors of the fan and sensors until the panel is completely fixed.
After assembly, install all shelves and drawers. Only after this turn on the refrigerator. The first start-up may take some time: the compressor needs to build up pressure, and the system needs to reach operating mode. Do not load the refrigerator with food during the first 2-3 hours of operation.
Check the operation of the fan: 10-15 minutes after turning on, listen to the sound of operation. The air must circulate actively. If you changed the heating element or sensor, check the process of the first automatic defrosting (usually occurs 8-12 hours after switching on).
Checklist after assembly:
- ✅ All screws are tightened, the panel is not loose
- ✅ Drawers and shelves are installed correct
- ✅ The refrigerator is plugged in, the indicator light is on
- ✅ After 30 minutes you feel cold inside the chambers
What to do if after assembly the refrigerator does not turn on?
Check whether the electrical connectors that you have installed are tightly inserted disconnected. Often the fan or sensor connector is simply forgotten to be connected. Also make sure that the door is tightly closed - in some models, the light and fan do not work when the door is open, creating the illusion of a breakdown.
How often do you need to defrost a No Frost refrigerator?
Technically, the No Frost system does not require manual defrosting. However, manufacturers recommend once a year (or if an odor appears) to completely defrost the unit for a day to carry out sanitary treatment and remove bacteria that are not removed by cold.
Is it possible to use a refrigerator if the back panel inside is broken?
It is not recommended to operate a refrigerator with a damaged inner panel. The aerodynamics of air flows are disrupted, which leads to uneven cooling and the formation of ice jams. In addition, sharp ice can damage the wiring or the panel itself even more.
Why did the refrigerator start to freeze worse after disassembly?
Most likely, the tight fit of the rear panel was broken during assembly or the air duct seal was installed incorrectly. Cold air may go into the technical compartment rather than into the chamber. Check the tightness of all elements.