Extraneous sounds coming from household appliances always cause alarm, especially when it comes to a refrigerator that works around the clock. A creaking, hum or whistle can signal either a minor malfunction that is easy to fix or serious problems with the unit components. These signals cannot be ignored, because timely intervention often saves an expensive compressor compressor from breakdown.
In this article we will analyze in detail why the refrigerator creaks during operation and will help you determine the source of the sound. You will learn to distinguish between normal operating noise and pathological vibrations that require the intervention of a technician or self-repair.
Natural sounds of a refrigeration unit
Before you panic and look for repair tools, you need to understand what sounds are normal for modern equipment. New models operating on type R600arefrigerants may produce a specific gurgling or quiet hissing sound. This is due to the circulation of freon through the pipe system and evaporator. The sound may increase immediately after turning the motor on or off.
It is also worth considering the thermal expansion of materials. The plastic of the internal shelves, doors and metal casing may crack or squeak slightly as the temperature changes. This usually happens in the first hours after defrosting or with a sudden change in temperature. If the sound is quiet and intermittent, most likely the equipment is working properly.
However, if you hear a monotonous, increasing creak that does not stop for several minutes, you should listen more carefully. Users often confuse the operation thermostat with a malfunction, but an experienced ear can distinguish the click of a relay from mechanical friction.
Incorrect installation and misalignment of the case
One of the most commonplace, but common causes of creaking is a violation of the geometry installations. If the refrigerator is not level, a misalignment occurs, which is transmitted to all internal mechanisms. In this case, the vibration of the running motor increases, and the rubbing parts begin to make unpleasant sounds.
Check the installation level using a building level or simply rock the unit from side to side. If it wobbles, the support legs need to be adjusted. Many models are equipped with screw supports that allow you to compensate for uneven floors.
⚠️ Attention: Never leave the refrigerator in a skewed state for a long period of time. This creates excess pressure on compressor and can lead to its premature failure.
Sometimes creaking occurs due to the fact that the back wall of the refrigerator is pressed too tightly against the wall or furniture. Vibration is transmitted to the surface, causing resonance. Move the equipment a few centimeters away from the wall to ensure free air circulation.
Check whether adjacent refrigerators or other equipment are not touching each other if they are installed in a row. Even a slight contact of the housings when one of them is working gives rise to loud rattling and creaking.
No Frost system malfunctions and fan operation
In refrigerators with the system No Frost the source of the squeak is often the fan located in the freezer compartment. Over time, the fan bearings wear out and the fan begins to hum or squeak when rotating. The cause may also be ice freezing on the blades that touch the body.
To check this version, open the freezer door. If the sound stops when you open the door (since in many models the fan turns off when the door is open), then this is most likely the problem. In some cases, complete defrosting of the unit is required within 24 hours.
- 🌀 Frozen bearing: The lubricant in the fan bearing thickens in the cold, causing a creaking noise when starting up.
- ❄️ Ice build-up: Failure of the defrost system leads to the fouling of the fan blades with ice.
- 🔌 Wire penetration: The internal wiring could have become dislodged and gotten into the blade rotation zone.
If defrosting did not help, the fan will need to be replaced. This is a simple procedure that you can do yourself with basic skills in using tools. The main thing is to find a fan model with similar mounting dimensions.
How to replace the fan yourself?
To replace it, you need to remove the back panel in the freezer, disconnect the power terminals of the old fan and install a new one. It is important to make sure that the impeller does not touch the walls of the casing.
Problems with the compressor and its mounting
The heart of the refrigerator - the compressor - can also become a source of noise. If the squeaking noise comes from the rear bottom where the motor is located, this may indicate worn internal parts or mounting problems. Older model compressors often ran louder, but a high-pitched squeak is not typical for them.
A common cause is loosening of the mounting bolts or rubber shock absorbers on which the motor is suspended. During operation, it vibrates, and if the fixation is broken, the metal parts begin to rub against each other. In this case, it is enough to tighten the bolts or replace the rubber gaskets.
A more serious situation is wear of the piston group inside the compressor. If the motor is running tight, a metallic clang or high-pitched squeak is heard. In such cases, repair is often not economically feasible, and replacement of the entire unit is required.
| Sound type | Probable cause | Difficulty of repair |
|---|---|---|
| Monotonous hum | Normal operation motor | Not required |
| Sharp metal creaking | Wear of motor bearings | High (replacement) |
| Quiet crackling | Thermal expansion | Not required |
| Whistling at startup | Problems with the starting relay | Average |
It is worth noting that inverter compressors work differently than normal ones. They do not turn off completely, but only change the power. Therefore, a quiet, even hum for them is the absolute norm, which differs from the cyclic operation of older models.
Wear of seals and door friction
Sometimes the source of irritating sound is not inside the mechanism, but at the junction of the door and the body. The rubber seal (cuff) loses elasticity over time, dries out or becomes dirty. When opening and closing the door, a characteristic squeak of friction between rubber and metal may occur.
Check the condition of the seal around the entire perimeter. If it is sticky, it should be washed with warm water and a mild detergent. If the rubber has become hard and brittle, it must be lubricated with a special silicone grease for rubber products or replaced.
The door hinges may also creak. Metal elements rust over time or lose their factory lubricant. It is enough to drop a couple of drops of machine oil or special lubricant into the hinge mechanism to eliminate the sound.
Pay attention to how the door closes. If it is skewed, the seal may rub against the body on one side more than on the other. Adjusting the door position helps solve this problem.
Vibration of internal elements and dishes
Do not forget that the source of noise can be objects located inside the refrigerator. Glass shelves, if they are not tightly fixed in the grooves, may vibrate from the operation of the compressor. Plastic containers placed on top of each other can also make unpleasant sounds.
Carry out a simple experiment: remove shelves and drawers one by one, listening to changes in sound. It often turns out that a “creaking refrigerator” is just a poorly placed jar of pickles or a loose grille.
- 🥛 Glass shelves: Check if there is a gap between the glass and the plastic frame.
- 🍾 Bottles and cans: Make sure that they do not touch each other or the walls of the chamber.
- 🧊 Ice tray: In the freezer, the tray may freeze or rattle when the fan is running.
Use special anti-vibration mats or shelf pads if the problem persists. This is especially true for refrigerators installed on wooden floors, which increase resonance.
☑️ Diagnosis of the noise source
When you need to call a technician
There are situations when self-repair not only will not help, but can also aggravate the situation. If you hear a loud metallic grinding sound accompanied by a burning smell, immediately unplug the appliance. This may indicate a compressor wedge or a short circuit.
Also, the help of a specialist is needed if, after defrosting and checking all external factors, the creaking persists. It may be necessary to replace the refrigerant, clean the capillary system, or complex repair of the motor-compressor that requires evacuation of the system.
⚠️ Attention: Do not try to open the sealed circuit of the refrigerator yourself or solder pipes without a license and equipment. This is life-threatening and will lead to complete breakdown of the equipment.
The technician will be able to accurately diagnose the problem using pressure gauges and testers. Professional repairs will extend the life of your refrigerator and ensure safe storage of food.
Noise prevention and equipment care
In order for your refrigerator to operate quietly and for a long time, it is important to follow the operating rules. Regular defrosting (if the model is not No Frost), cleaning the condenser from behind from dust and monitoring the condition of the seals is the key to silence.
Do not overload the refrigerator with food. Excess weight can place additional stress on the shelves and compressor, causing increased vibration. Distribute food evenly.
Make sure that the refrigerator is in a ventilated place, away from heat sources. Overheating causes the motor to work harder and noisier.
Timely replacement of worn parts, such as a fan or seal, is much cheaper than repairing a compressor that has suffered from overload.
Why does a new refrigerator squeak in the first days?
A new refrigerator can squeak due to shipping bolts if they are not removed, or because the parts have not yet “got in.” It is also possible that it is simply uneven. Let the equipment sit for several hours before turning it on.
Is it possible to lubricate a squeaking compressor?
It is useless to lubricate the compressor itself from the outside, since it is sealed. Only the external fasteners, shock absorbers or door hinges need to be lubricated. The internal creaking of the motor indicates its wear.
Does the filling level affect the creaking?
Yes, an empty refrigerator can be louder due to the lack of products that absorb sound waves. However, this will not cause a strong creaking; rather, the nature of the hum will change.
What to do if it creaks only at night?
At night, extraneous noises are heard better. If the squeak is cyclical, check to see if it is related to the ice maker or the defrost cycle. Also at night, the voltage in the network may drop, which affects the operation of the motor.