The situation when your Samsung stops freezing, but inside the chamber rapidly warms up, always takes you by surprise. You open the door and listen to the silence, although usually the unit works quietly but confidently. This is the first signal that the cooling cycle is interrupted, and the compressor does not receive a start command or is physically unable to start.
Modern models, such as Samsung No Frost, are equipped with sophisticated electronics that control every stage of operation. If the self-diagnosis system detects a critical error in the sensors, control board or the engine itself, it blocks starting to prevent fire or failure of expensive components. Understanding why the refrigerator does not turn onwill help you decide: call a technician or try to fix the problem yourself.
In this article we will analyze in detail the mechanical and electrical reasons for equipment downtime. We'll look at the symptoms of a humming, clicking, or silent device and explain what those sounds mean. It is important not to panic, but to consistently check the power circuits and the condition of the main components.
Primary diagnostics: light, sound and indication
Before disassembling the back panel, it is necessary to conduct a visual inspection and a basic check. Often the problem lies not in a breakdown, but in a simple lack of voltage or a tripped protection. First of all, check whether indication on the control panelis on. If the display is inactive, the problem may be in the socket or power filter.
Pay attention to the behavior of the compressor when you try to turn on the equipment. If you hear a low hum that ends abruptly with a click, this indicates a starting attempt that is being blocked by the safety relay or starting device. In models with Digital Inverter the nature of the sounds may differ from classic piston engines.
If the indicators blink or an error code appears on the screen (for example, 22C, 1E), this greatly simplifies troubleshooting. The electronic module has already carried out self-diagnosis and reports a specific unit that has failed. Write down the code, it will be needed to accurately determine the cause.
⚠️ Attention: If you smell burning or see melted wiring in the compressor area, immediately unplug the device. Further attempts to turn on may lead to a short circuit.
Problems with the starting relay and compressor
One of the most common reasons why the motor-compressor does not start is the failure of the starting relay. This small element is responsible for supplying a starting pulse to the motor winding. If the relay is “stuck” or burnt out, the compressor cannot overcome the inertia and start the freon compression cycle.
Older models use posistor relays, which lose their properties over time. More modern units Samsung may have electromagnetic options. The symptoms of a malfunction are usually the same: a loud click is heard, the motor tries to hum for a few seconds, then another click follows and turns off. This cycle can be repeated endlessly.
Replacing a relay is a procedure accessible to a home craftsman, but requires caution. It is necessary to remove the protective casing from the compressor, disconnect the wires and remove the faulty part. It is important to choose an analogue with exactly the same electrical characteristics indicated on the case.
How to check a relay with a multimeter?
To check a posistor relay, shake it near your ear: if you hear a ringing (ceramics dangling), it is definitely faulty. The electromagnetic relay is checked by continuity: in a cold state the contacts are open, when voltage is applied (carefully!) they must close. However, it is safer to simply replace the part with a known good one.
If after replacing the relay the situation has not changed and the engine still does not start, the problem may be deeper. Perhaps turn-to-turn short circuit occurred in the windings of the compressor itself or jamming of the piston group. In this case, a characteristic hum is heard, turning into a buzz, but there is no rotation. Repairing such a motor is impractical; a complete replacement of the unit is required.
Faults of the electronic control module
Modern refrigerators Samsung are controlled by complex electronics. If the control module fails or fails, commands to start the compressor and fans are simply not received. This often happens after power surges in the network, even short-term ones.
Symptoms can be varied: the refrigerator hums, but does not freeze; or vice versa, the light is on, but there is complete silence. In some cases, the module may give incorrect signals, causing the compressor to run without stopping or, conversely, blocking it from starting. Diagnostics of the board requires special knowledge and equipment.
Often visual signs of a malfunction are visible on the board: swollen capacitors, blackened traces or burn marks. If you do not have the skills to solder and work with high voltage electronics, it is better not to climb inside the control unit. A connection error can completely “kill” an expensive module.
| Symptom | Possible cause | Probability |
|---|---|---|
| Clicking and buzzing for 5-10 seconds | Startup relay or compressor jam | High |
| Silence, light is on | Malfunction of the thermostat or control module | Medium |
| Indication flashing | Sensor or system error No Frost | High |
| Humming constantly, not cooling | Freon leak or clogged capillary | Medium |
The role of the thermostat and temperature sensors
The thermostat (or temperature sensor in electronic models) is the “eyes” of the refrigerator. It is he who informs the system that the chamber has become warm and it is time to turn on the cooling. If this element is faulty, the refrigerator “thinks” that there is already cold and does not start the compressor.
In mechanical models, the thermostat is a capillary tube with a bellows. If it breaks, the contacts inside simply do not close. You can check it by temporarily shorting the wires coming from the thermostat (bypassing the regulator itself). If after this procedure the motor starts working, the reason has been found and replacement is required.
The systems Samsung No Frost use air sensors. They may give incorrect readings due to oxidation of contacts or damage to the integrity of the wiring. Often the problem lies not in the sensor itself, but in a broken wire in the door corrugation, which breaks due to frequent opening.
It is also worth mentioning the defrost sensor. If it shows an incorrect evaporator temperature, the system may go into an endless defrost cycle or, conversely, not start defrosting, which will lead to ice fouling and the fan stopping, although the compressor may still work.
⚠️ Attention: When replacing temperature sensors, it is important to use original spare parts or high-quality analogues with similar resistance at a certain temperature. An incorrect rating will lead to incorrect operation of the entire refrigeration circuit.
No Frost system: fan and evaporator
If the refrigerator is humming, the compressor is working, but there is no cold, there may be a problem with the air circulation. In models No Frost the cold is pumped by a fan through a hidden evaporator. If the fan does not spin, the cold remains in the technical compartment and does not enter the chamber.
The reasons for the fan stopping can be different: from freezing of the blades in slush ice to failure of the electric motor. An ice plug often forms due to a malfunction of the defrost system (heating element, timer, sensor). In this case, you need to defrost the refrigerator within 24 hours.
Check if anything is preventing the rotation of the blades. Sometimes a foreign object or frozen ice blocks the rotor. If the fan does not work after complete defrosting, check the voltage at its terminals. The absence of voltage will indicate a problem in the control circuit or the engine itself.
☑️ Diagnostics of the No Frost system
Refrigerant leak and system blockages
There are times when the compressor starts and works properly, but the refrigerator does not freeze. This is a classic sign of a freon leak or a clogged capillary tube. Freon is a working fluid that transfers heat. If it is not there or it does not circulate, there will be no cooling.
Leaks often occur at the soldering points of the tubes or in the foamed part of the housing (evaporator). Finding a leak on your own without special equipment (leak detector, pressure gauge station) is almost impossible. The blockage is usually caused by moisture or oil breakdown products entering the narrow channel of the capillary.
These problems can be diagnosed by the temperature of the condenser (grid at the back). If after a long period of operation the grate remains cold or only heats up at the compressor, and is cold at the other end, there is a lack of freon or circulation. Repair in this case requires calling a specialist with equipment for evacuation and refilling.
Important: Attempts to simply “add” freon without looking for leaks and replacing the filter-drier will only give a temporary effect. After a week or a month, the problem will return, and the compressor may burn out from working without cooling or moisture ingress.
⚠️ Attention: Working with refrigerant requires a license and special equipment. Self-refueling is dangerous and can lead to an explosion or fire if you use the wrong gas or do not follow the technology.
Frequently asked questions from users (FAQ)
The Samsung refrigerator clicks but does not turn on. Is this dangerous?
Clicks usually mean the operation of the protective relay, which is trying to start the compressor, but the overload current causes it to open the circuit. This is not dangerous in the short term, but prolonged operation in this mode can burn out the compressor windings. It is better to turn off the device before the technician arrives.
Is it possible to operate the refrigerator if it does not freeze, but the light is on?
It is strictly not recommended. Products will begin to deteriorate, and a compressor running empty (if it is humming) will quickly overheat and fail. If the compressor is silent, then there is no risk for it, but the food will still be lost.
Why does the refrigerator turn on for 5 seconds and turn off?
This is the work of a thermal protection relay. It detects overcurrent (the motor cannot turn) and breaks the circuit to save the motor from burning out. The reason is most often the start relay, a jammed compressor, or low voltage in the network.
How to reset an error on a Samsung refrigerator?
The easiest way is to disconnect the refrigerator from the power supply for 15-20 minutes. If the error was caused by a temporary electronic failure, it will disappear. If the fault is hardware (the sensor is burned out), the error will return immediately after switching on or after several operating cycles.