Buying new household appliances is always a joyful event, which, however, can be overshadowed by an unpleasant surprise in the form of excessive noise. The situation when a new refrigerator runs loudlycauses owners understandable concern and questions about the serviceability of an expensive unit. Unlike older models, modern devices are equipped with complex refrigerant compression and circulation systems, which can produce various sounds that do not always indicate a breakdown.
The initial start-up is often accompanied by an unusual hum, crackling or gurgling, which is associated with the adaptation of the mechanisms to new operating conditions and thermal expansion materials. It is important not to panic, but to listen carefully to the nature of the sound and analyze the installation conditions of the device. In most cases, the problem can be solved independently, without calling a technician, simply by changing the position of the case or checking the transport fastenings.
Understanding the nature of the sounds that occur will help you determine whether the noise is a sign of a malfunction or normal operation. Below we will analyze in detail the main reasons why a new refrigerator can be loud and offer step-by-step instructions for eliminating discomfort.
Natural sounds during first startup and adaptation
Modern refrigerators, especially models with the system No Frost, are equipped with powerful compressors and fans, which can operate in enhanced mode during the first hours of operation. This is necessary to quickly cool the chambers to the specified temperature parameters. During this period operation noise may be significantly higher than usual, which is an absolutely normal reaction of the equipment to the initial switching on.
In addition to the hum of the motor, owners often hear crackling, clicking or sounds of bursting plastic. These manifestations are caused by thermal expansion and contraction of the internal elements of the housing, evaporator and plastic panels due to a sharp change in temperature. Materials “get used” to new conditions, and this process can last from several hours to a couple of days.
⚠️ Attention: If after 24-48 hours of continuous operation the noise level does not decrease, and the nature of the sounds becomes harsh or metallic, it is necessary to conduct a more thorough diagnosis of the device.
It is also worth considering that digital inverter compressors, found in many new models operate differently than their older linear counterparts. They may emit a low-frequency hum or high-frequency whistle, which is subjectively perceived as louder, but technically is a sign of effective operation of the system.
Checking the correct installation and shipping bolts
One of the most common reasons why a new refrigerator makes loud vibration sounds is incorrect installation. If the body of the device touches walls, furniture or other objects, vibration from the operating compressor is transmitted to them, increasing the overall background noise. It is necessary to provide a gap of at least 5-10 cm on all sides for free air circulation.
A critical point is to check shipping bolts or the fasteners. Many users forget that during transportation the compressor is rigidly secured with special bolts or brackets, which must be removed before the first use. If this is not done, the compressor will work “breaking”, producing a loud knock and strong vibration, which can lead to its rapid failure.
☑️ Check before turning on
To dismantle the fasteners, you usually need a wrench, which comes complete with documentation. The bolts may be located at the rear bottom of the housing or hidden by a decorative panel. After removing them, it is often recommended to close the holes with plugs to prevent dust and moisture from entering.
The influence of a flat surface and adjusting the legs
Even the slightest distortion of the refrigerator body can cause rattling and humming. If the appliance is placed on an uneven floor or its feet are not adjusted correctly, resonance will occur, which will increase engine performance. Vibration is transmitted to the floor and walls, creating the effect of a “rattle” refrigerator.
To eliminate this problem, you need to take a building level and check the horizontal installation. Adjustment is carried out by unscrewing or tightening the front support legs. In some models, this requires a key, in others you can do it with your hands by lifting the front part of the case.
After adjustment, try to slightly rock the refrigerator. It should stand stable and not wobble. If the vibration persists, check to see if the shelves or glass trays themselves are vibrating. Sometimes it is enough to simply correct them or place soft spacers under the glass elements.
Characteristics of the compressor and cooling system
The type of installed compressor directly affects the level of acoustic comfort. Linear compressors operate jerkily: they turn on at full power, cool the chamber and turn off. The moment of switching on and off is always accompanied by a click of the relay and a characteristic hum, which can be quite loud.
Inverter compressors, on the contrary, operate constantly, but with variable power, smoothly regulating the speed. They are considered quieter in terms of the lack of harsh starting sounds, but can produce a monotonous low-frequency hum or high-frequency buzz, which some users perceive as intrusive. The noise level of modern models is usually from 36 to 42 dB, but in a quiet apartment this can be noticeable.
Why can an inverter refrigerator hum?
Inverter motors use a frequency converter, which can produce a high-frequency whistle. Also, a hum may occur due to the operation of the defrosting system or the circulation of freon in the tubes.
It is also worth considering the power of the device. Large dual-compressor models or refrigerators with a fresh zone and an ice maker have a more complex refrigerant circulation system, which inevitably increases the number of operating sounds: from the gurgling of liquid in the tubes to the operation of additional fans.
Comparison of noise levels of different types of refrigerators
To understand whether the noise of your new device is the norm, it is useful to compare its characteristics with generally accepted ones standards. The table below shows the average noise levels for various types of equipment, which can be found in the technical data sheet.
| Refrigerator type | Average noise level (dB) | Sound character | Is this normal? |
|---|---|---|---|
| Single compressor (old type) | 40-45 dB | Humming, clicking at start | Yes, but loud |
| Inverter (modern) | 36-39 dB | Monotonous hum, hissing | Yes, normal |
| No Frost (with fan) | 38-42 dB | Sound of operation fan | Yes, normal |
| Two-compressor | 40-44 dB | Operation of two motors alternately | Yes, normal |
It is important to understand that the 38-40 dB declared by the manufacturer are ideal laboratory conditions. In a real apartment, where sound bounces off walls and furniture, subjective loudness may be higher. If measurements show values significantly exceeding the passport data (for example, more than 50 dB at a distance of 1 meter), this is a reason to contact the service.
In addition, the perception of noise is affected by the acoustics of the room. An empty kitchen with a tiled floor will amplify the sounds of operating appliances, while in a furnished room with textiles the noise will be absorbed.
Foreign objects and internal rattling
Sometimes the source of loud sound is inside the refrigerator chambers. Vibration from the compressor can be transmitted to shelves, boxes and bottles, causing them to rattle. This happens especially often with glass shelves if they do not fit tightly to the guides, or with plastic containers in the door.
Check that the food does not touch the walls of the chamber. Also make sure that drink bottles are not placed too close to each other - when they vibrate, they can rattle, creating a rhythmic clinking sound. Remove all unnecessary objects and check if the noise has disappeared.
Special attention should be paid to the system No Frost. In such models, fans are constantly running, which can make noise if ice has formed on their blades (which is rare for a new device) or if they touch a frozen piece of food. However, in a new refrigerator, the cause of fan noise is often a manufacturing defect or a foreign object entering during assembly.
When you need to call a technician: signs of a malfunction
There are a number of sounds that clearly indicate a technical problem and require the intervention of specialists. If you hear a loud metallic clanging, grinding, or hammer-like noise, this may indicate a compressor problem (such as worn valves or bearings).
A whistling sound may indicate a freon leak or problems with refrigerant circulation. If the loud sound is accompanied by a lack of cold or excessive heating of the side walls, use of the device should be stopped.
⚠️ Attention: Self-repair of the compressor or freon circulation system is prohibited and dangerous. If you suspect a mechanical breakdown of the internal components, immediately contact an authorized service center so as not to lose the warranty.
Also a reason to contact the service is a situation when the refrigerator makes loud noises only at a certain position of the door or when the noise is accompanied by blinking indicators on the control panel. The warranty card must include a record of the diagnostics performed.
Frequently asked questions (FAQ)
How long can a new refrigerator operate loudly?
The adaptation period is usually from 2 to 24 hours. At this time, the compressor works almost non-stop, trying to gain temperature. If after a day the noise has not become quieter, check the installation and the absence of transportation bolts.
Is it normal for the refrigerator to gurgle and click?
Yes, these are normal sounds of refrigerant circulating through the evaporator and condenser tubes. Clicking thermostats are also a normal operation of the automation when the compressor is turned on and off.
Is it possible to reduce the noise of a refrigerator with your own hands?
Yes, you can align the legs, move the appliance away from the walls, check the tightness of the shelves and remove foreign objects. Anti-vibration pads under the feet also help.
Why was the old refrigerator quieter than the new one?
Modern refrigerators often have more powerful compressors and a forced air circulation system (No Frost), which create more noise than simple static cooling systems of older models. In addition, energy efficiency requirements affect the design of motors.