A request connecting the Voice of America and a refrigerator may seem strange or even absurd at first glance. However, among technicians, appliance repairmen and enthusiasts, this phrase has long acquired the status of a stable professional metaphor. Voice of America in this context, it has nothing to do with radio stations or political broadcasts.
We are talking about a specific sound profile that emits compressor or relay the refrigerator during operation. Users often look for information about what this “voice” is about, trying to diagnose the malfunction of their unit by the characteristic hum, crackling or whistling. Understanding the acoustic signals of your refrigerator is the first step to identifying serious breakdowns before they lead to food spoilage.
In this article we will look in detail at why such a comparison arose, which parts make sounds reminiscent of an announcer or radio interference, and how distinguish the normal operation of equipment from the harbingers of expensive repairs. Technical diagnostics often begins with careful listening.
The origin of the term and the acoustics of refrigeration equipment
The phrase “Voice of America” in the mouths of refrigeration workers is a figurative description low-frequency humming, turning into intermittent crackling or modulated noise. This sound is often associated among the older generation with interference on shortwave radios through which foreign radio stations were broadcast. When refrigeration compressor starts to make such sounds, this almost always indicates mechanical or electrical processes inside the motor.
The sound wave perceived as a “voice” arises due to vibration of metal tubes, valves or the housing itself. compressor. In good condition, the unit should operate relatively quietly, producing only a uniform hum. The appearance of extraneous modulations resembling human speech or radio interference indicates an imbalance in the system.
⚠️ Warning: If you hear sounds that resemble intermittent speech, crackling or "murmuring", do not ignore it. In contrast to a uniform hum, such noises often precede jamming of the piston group or failure of the start relay.
It is important to understand that Acoustic comfort the refrigerator depends not only on the quality of the assembly, but also on correct installation. Vibration can be transmitted to the cabinet body, floor or walls, enhancing the “radio transmission” effect. Sometimes it is enough just to correct the position of the unit so that the “voice” disappears.
Compressor: the heart of the system and the source of noise
The main source of any sounds in the refrigerator is compressor. This is a sealed unit within which refrigerant circulates under high pressure. This is where electrical energy is converted into mechanical movement of the pistons. If strange sounds are heard inside, the problem most likely lies in the mechanics of this unit.
The “Voice of America” is often called the sound produced by valve group. When valves wear out or freon pressure changes, the gas flow begins to create turbulence, which is perceived audibly as muttering. The electric motor itself can also serve as a source if the shaft bearings have exhausted their service life.
Modern inverter compressors work on a different principle than the old linear models. They do not turn off completely, but only change speed. Therefore, the sounds they make can be more varied: from a quiet whisper to a high-frequency whistle. Understanding the difference between types of motors is critical for diagnostics.
What is the difference between a linear compressor and an inverter one?
A linear compressor operates on the “on-off” principle, which creates characteristic clicks and noise when starting. The inverter operates constantly, changing power, which makes it quieter overall, but it can produce high-frequency sounds that are imperceptible to some people.
Diagnostics of the condition of the compressor requires a careful analysis of the nature of the sound. If the “voice” becomes louder over time or changes pitch, this is a sure sign that the node’s resource is coming to an end. In such cases replacement of the compressor becomes a matter of time.
Relays and starting equipment: electrical clicks
Another source of sounds that users can associate with radio broadcasts is starting relay. This small element is responsible for starting the compressor engine. Older models used relays with a posistor or electromagnetic ones, which, when triggered, produced a loud, distinct click.
If the relay is faulty, it may begin to “crackle” or “chirp”, trying to start the engine, but not achieving the desired effect. This creates a rhythmic sound that can actually resemble telegraphic transmission or broken speech. In modern refrigerators electronic modules controls operate almost silently.
Replacing a relay is one of the simplest and cheapest repair procedures. However, ignoring the crackling noise can lead to burning of the motor windings, since the compressor will try to start endlessly. Thermal relay in such a situation, it will constantly open the circuit, protecting the motor from overheating.
☑️ Starter diagnostics relay
It is worth noting that in some models of refrigerators time relay or defosters can also make sounds when switching modes. This is normal if the clicks are rare and are not accompanied by a failure of the cooling system.
Refrigerant and circulation sounds: gurgling and hissing
Not all sounds come from mechanical parts. Often the “voice” is called the circulating noise refrigerant. Freon, moving through the evaporator and condenser tube system, can gurgle, hiss or whistle. This is especially audible immediately after the compressor stops or when the operating mode changes.
The sound of liquid flowing in the tubes is a normal physical process. However, if the hissing becomes constant and loud, this may indicate freon leak. At the point where gas under pressure emerges, a characteristic whistle appears, which is difficult not to notice. In this case, the refrigerator stops freezing.
It is important to distinguish sounds in different areas of the refrigerator. Gurgling at the top (where the condenser is) or at the bottom (where the compressor) is usually safe. But if the sound appears suddenly and is accompanied by loss of cold, refueling is necessary. sealing the system and refueling.
| Type of sound | Probable cause | Danger | Actions |
|---|---|---|---|
| Uniform hum | Compressor operation | No | Observation |
| Crackling/Clicking | Relay, thermostat | Average | Replacement of relay |
| Whistling/Hissing | Freon leakage | High | Call a technician |
| Loud knocking | Piston wear | Critical | Replacing the motor |
Oil circulation together with freon can also create specific sounds. If there is excess oil in the system or it has lost its properties, the noise background may change. Refrigeration oil should circulate freely and return to the compressor crankcase.
Vibration and resonance: when the whole cabinet is humming
Sometimes the Voice of America is not an internal problem, but the result of an external resonance. Vibration from a running motor is transmitted to the body, shelves, dishes or even to the walls of the kitchen. If the refrigerator is not level, the vibration increases many times over.
Check adjusting supports the refrigerator. They must be unscrewed so that the unit is stable and does not swing. Often it is enough to twist the legs for the obsessive hum to disappear. Plastic elements inside the chambers can also become a source of noise.
If the refrigerator is moved too close to the wall or furniture, vibration can be transmitted to them, causing the structure of the room to “sing”. Acoustic comfort depends on the correct gap between the equipment and the walls.
Inspect the back wall of the refrigerator. The condenser tubes (black grille at the back) must not touch each other or the housing. When they vibrate, they can ring, creating a high-frequency metallic sound that can easily be mistaken for something more serious.
Diagnosing faults by sound
Listening to your refrigerator is a skill that saves money. If you hear Voice of America, do a simple test. Unplug the refrigerator and turn it on again. If the strange sound repeats every time you start, the problem is systemic.
Pay attention to the temperature. If there is sound, but the cold persists, it may be due to vibration or relay. If the sound is accompanied by heat in the chambers, the counter spins faster than usual, and the motor is hot - these are signs of mechanical failure mechanical failure.
Do not try to disassemble the sealed compressor unit yourself. This is dangerous and requires special equipment. However, you can replace the relay, check ventilation or align the position of the housing yourself.
⚠️ Attention: Technical characteristics and design of the relay may vary depending on the refrigerator model. Before purchasing spare parts, check the markings on the body of the old relay with the manufacturer's catalog or a store consultant.
Timely reaction to changes in the sound background allows you to eliminate the problem at an early stage. Preventive repair always cheaper than replacing a burnt out motor or defrosting spoiled products.
Frequently asked questions (FAQ)
Why did the refrigerator start making radio-like sounds?
This phenomenon is often caused by vibration of internal components, worn compressor valves, or the operation of an old start relay. Sound waves of a certain frequency create an effect reminiscent of a modulated radio signal.
Is it dangerous to continue using a noisy refrigerator?
If the sound is uniform and there is cold, most likely not. But if there is a crackling, knocking or whistling sound, this may indicate an imminent breakdown. It is better to carry out diagnostics to avoid sudden failure.
Is it possible to lubricate a compressor if it is noisy?
No, the compressor is a sealed unit. It is impossible to lubricate it “from the outside”. If the noise is caused by wear and tear of the internal mechanisms, only replacing the entire unit will help.
Does the network voltage affect the sound of the refrigerator?
Yes, low or unstable voltage can cause humming of transformers (if any) or difficulty starting the compressor, which is accompanied by a change in the sound background.