The situation when the refrigerator makes noise like a tractorcan unbalance even the calmest person. A constant hum, vibration or sudden knocking is not only annoying, but also signals serious problems in the operation of the unit. Ignoring these sounds can lead to breakdown of expensive components and spoilage of products.
In this article we will analyze in detail the mechanics of noise, from the harmless rattling of dishes to critical wear. compressor. You will learn to distinguish between types of sounds and understand when you can handle it yourself and when you need to call a specialist.
Primary diagnosis: determine the source of the sound
Before grabbing the tools, you need to accurately localize the source of the problem. The sound can come from the case itself, internal mechanisms or external factors. Listen carefully: humming, knocking or whistling have different origins.
Often owners confuse a normal operating hum with signs of a malfunction. Modern models, especially those with inverter compressorscan make specific sounds when starting up or entering energy saving mode. However, if the unit trembles throughout the entire body, this is a clear sign of imbalance.
⚠️ Attention: If the noise is accompanied by a burning smell, melted wiring or sparking, immediately disconnect the device from the power supply. Operation of such a device is dangerous to life and property.
For accurate diagnostics, remove the back panel (if the model allows) and visually assess the condition of the tubes and wires. Sometimes it is enough just to straighten a hanging cable that vibrates from the operation of the motor to eliminate the annoying sound.
Installation problems: when the floor is crooked than the refrigerator
The most commonplace, but common reason the refrigerator makes a lot of noise is incorrect installation. The unit must stand perfectly level. If the legs are not adjusted, the body warps, which leads to displacement of internal components and increased vibration.
Check the gap between the walls of the appliance and the furniture. For normal air circulation and absence of resonance, a minimum of 5-10 cm of free space is required. Pressed close to the wall refrigerator begins to transmit vibration to building structures, increasing the noise significantly.
Also check the stability of the floor. On wooden floors or laminated flooring, even a working motor can cause resonance throughout the room. In such cases, it is necessary to move the equipment to a more stable corner.
Vibration of components: tubes, wires and fasteners
The internal structure of the refrigerator and freezer is full of copper tubes and electrical cables. Over time, the fastenings weaken, and under the influence of vibration from the operating compressor they begin to beat against each other or against the walls of the case.
This sound is often described as a metallic rattling or clicking sound. You don't have to be a professional to fix it. It is enough to carefully straighten the tubes, increasing the distance between them, and secure them with clamps.
☑️ Checking the fasteners
Pay special attention to the condensate collection tray located above the motor. If it is loose, it will rattle every time the engine cycles. Place a piece of foam rubber or rubber under it for silent fixation.
Compressor malfunctions: the heart of the refrigerator is knocking
If you hear a loud metallic clang or impact when starting the motor, the problem most likely lies within the compressor. This may indicate a breakdown of the start relay or wear of the internal piston groups.
In older models, the “water hammer” effect is often encountered when liquid freon enters the compressor cylinder instead of gas. This causes a characteristic knock. In modern systems, this can also be a sign of a malfunction thermostatthat does not turn off the refrigerant supply in time.
| Sound type | Probable cause | Complexity repair |
|---|---|---|
| Loud clicking and buzzing | Faulty starting relay | Low (part replacement) |
| Metallic knock inside the motor | Piston wear groups | High (compressor replacement) |
| Whistling during operation | Freon leak or problem with valve | Medium (evacuation required) |
| Smooth, but very loud hum | Wear of bearings or shock absorbers | Average |
If diagnostics indicate a breakdown of the internal parts of the engine, independent repair is impossible. You will need to replace the entire unit with a new one compatible with your refrigerator model refrigerator.
Is it possible to change the compressor yourself?
Replacing a compressor requires special equipment: a vacuum pump, a pressure gauge station and a torch for soldering copper tubes. Without these tools and skills, the sealing of the system will be compromised, which will lead to rapid failure of the equipment.
No Frost system: when the fan howls
In models with the system No Frost fans are responsible for circulating cold air. If your refrigerator starts making a whistling or howling sound, the problem is almost certainly theirs. The blades could have iced up or the fan motor bearing may have worn out.
It often happens that frozen ice blocks the rotation of the blades. In this case, the fan motor tries to turn them, producing a strained hum. The solution to the problem is to completely defrost the unit within 10-12 hours.
If the noise returns after defrosting, it means the fan bearing has dried out or collapsed. In this case, the unit needs to be replaced. This is an inexpensive part, but its replacement requires partial disassembly of the inner chamber.
⚠️ Attention: When working with the No Frost system, be extremely careful with plastic parts and heating elements. They can easily be damaged by careless movement, which will lead to disruption of air circulation.
Depreciation and wear: old age is not a joy
Any mechanism has its own resource. If your refrigerator is more than 7-10 years old, the noise may be due to natural wear and tear on the shock absorbers on which the compressor is suspended. Over time, rubber hardens and ceases to dampen vibrations.
Check the condition of the springs and rubber cushions. If they are flattened or cracked, they need to be replaced. This will return silence to the kitchen and extend the life of the motor, which will stop working under conditions of increased vibration load.
It is also worth checking the condition of the thermal insulation. If the polyurethane foam layer has moved away from the walls, it may resonate. In rare cases, carefully gluing the loose areas with a special glue that does not destroy the insulation structure helps.
When it’s time to call a specialist
There are a number of symptoms in which independent actions are not only useless, but also dangerous. If you are not confident in your abilities, it is better to trust professionals who have access to original spare parts and diagnostic equipment.
An urgent call to a specialist is necessary if the noise is accompanied by a lack of cold, the appearance of puddles of water on the floor, or if the motor runs continuously without turning off. These are signs of a leak in the circuit or a serious electrical malfunction.
Do not forget that attempting to repair complex components yourself often voids your warranty. If the equipment is new, any opened seal may be grounds for refusal of free service.
Why is the new refrigerator noisy?
The new unit may be noisy due to shipping bolts that were forgotten to be unscrewed, or because the compressor needs time to “break in”. Usually, after 3-5 days of operation, the noise level decreases to normal.
Is it possible to lubricate the compressor so that it does not make noise?
No, the compressor is a sealed unit, not intended for maintenance at home. Lubricating the external tubes will not have an effect, and a violation of the tightness will lead to a freon leak.
Is it normal for the refrigerator to gurgle?
Yes, the sound of flowing liquid (freon) in the tubes is an absolutely normal operating process. It indicates proper circulation of refrigerant in the system.