The quiet hum of a running compressor is a normal condition for modern household appliances, but when the refrigerator makes a sound like a cricketit causes understandable concern. Such a specific chatter or high-frequency squeak often indicates mechanical friction, vibration of plastic parts, or problems with the condensate drainage system. Unlike a loud hum, this sound can be barely noticeable, but due to its periodicity and tonality it is very annoying, especially at night.
Before calling a technician, it is necessary to carry out an initial diagnosis to rule out simple causes. Often the source of the “cricket” is not the unit itself, but an incorrectly installed container inside or vibration of the tubes against the housing. However, the problem cannot be ignored: if compressor or fan make extraneous sounds, this may signal the beginning of bearing destruction or lack of lubrication, which will lead to expensive repairs.
In this article we will look in detail at why equipment starts to crack, how to find the source of the noise, and whether you can fix the problem yourself. You will learn which parts require immediate attention, and in which cases it is enough to simply adjust the egg tray. It is important to understand that precise localization of sound is already half the solution to the problem.
Mechanical reasons: vibration and contact of parts
The most common reason the refrigerator makes a sound like a cricketlies in banal physics. Vibrations generated during engine operation are transmitted to all structural elements. If any part is located too close to the vibrating part, resonance and a characteristic chattering sound occurs. Most often, the contact comes from copper tubes condenserlocated on the back wall, or the compressor housing itself.
Inside the chambers, the source of noise can be shelves, glass inserts or food. Even a light touch of the bottle against the wall while vibrating can create a sound reminiscent of the chirping of an insect. It is also worth checking condensate collection container, which is often located above the compressor. If it is loose, the air flows from the fan will cause it to rattle.
⚠️ Attention: If you find that the tubes on the rear panel are touching, under no circumstances try to straighten them by force while under voltage. Unplug the appliance and use rubber gaskets or a piece of foam to isolate touch points.
To eliminate mechanical noise, it is often enough to simply move the refrigerator away from the wall or level it. The legs of the unit must rest firmly on the floor to ensure stability. If the floor is uneven, the vibration will increase, turning into an obsessive crackling sound.
Problems with the No Frost system and ice
If your No Frost refrigerator makes a sound like a cricket, most likely the problem is related to the formation of ice on the evaporator or in the water drainage system. In models with automatic defrosting, water flows into a special gutter and goes through a drainage tube into a container. If an ice plug has formed in the tube, the dripping water begins to freeze, creating characteristic clicks and crackles, very similar to chirping.
Another source of sound in systems No Frost is the fan. When the evaporator freezes, the fan blades may touch the accumulated ice. This causes an intermittent noise that comes and goes. In some cases, the plastic fan housing cracks from the cold, and its parts begin to vibrate when rotating.
- 🧊 Ice on the fan blades causes an intermittent chirping sound when starting up.
- 💧 A clogged drainage hole leads to gurgling and subsequent crackling sounds of freezing water.
- ❄️ Freezing of the evaporator disrupts air circulation and creates resonant frequencies.
To test this theory, it is necessary to completely defrost the refrigerator. Leave doors open for at least 24 hours. If after switching on the “cricket” disappeared, then the reason lay precisely in the ice. If the noise returns after a few days, a more in-depth diagnosis will be required.
☑️ Actions in case of freezing
Diagnostics of the compressor and start relay
When the refrigerator compressor makes a sound like a cricket, this may be a sign of serious technical malfunctions. The motor-compressor is the heart of the unit, and any extraneous sounds in this area require special attention. Often the cause is start relaywhich, when worn out, begins to spark or make a cracking sound when trying to start the engine.
Another reason is wear of the internal bearings of the compressor or imbalance of the piston groups. In this case, the sound may resemble not only a cricket, but also a metal squeak. If you hear that the motor is humming, but does not start, accompanied by a cracking sound, perhaps the relay cannot start the rotor, and the protection is activated.
| Sound type | Probable cause | Danger | Action |
|---|---|---|---|
| High-frequency squeak | Vibration of tubes or plastic | Low | Isolate parts |
| Rhythmic crackling | Fan touches ice | Medium | Defrost 24 hours |
| Crackling sound at startup | Start relay | High | Replacement relay |
| Metal grinding | Compressor wear | Critical | Call a technician |
Independent replacement of the starting relay is possible if you have basic operating skills with electrics. However, if the problem is inside the sealed compressor casing, DIY repair is impossible and requires replacing the entire unit.
How to check the start relay?
Remove the relay from the compressor and shake it. If you hear a ringing noise inside (like breaking glass or ceramic), it means the bimetallic strip or coil is broken. The relay requires replacement.
Fan: the main source of high-frequency noise
Modern models, especially embedded systems No Frost, actively use fans to circulate air. They are the ones that most often make the sound that users describe as “cricket chirping.” Over time, the lubricant in the fan bearings dries out, the axle begins to turn with difficulty, and a characteristic squeaky-crackling sound appears.
Fan blades can become deformed due to time or temperature changes. Even a microscopic misalignment leads to beating, which is transmitted to the body and intensifies, creating a chirping effect. Also, small debris or a piece of ice that has broken off from the evaporator may get into the fan.
For diagnostics, you need to locate the source of the sound. Place your ear against the back wall (if there is a fan there) or open the freezer (if there is a fan inside). If the sound comes from the fan, you can often replace it yourself by selecting an analogue in size and voltage.
The influence of temperature and operating mode
Thermal expansion of materials is another reason why the refrigerator makes a sound like a cricket. The plastic of the internal chambers, glass shelves and metal tubes change their size during cooling and heating (during shutdown cycles). This process is accompanied by clicks and crackling sounds, which in the silence of the night can be mistaken for insects.
Such sounds occur especially often after loading a large amount of warm food or after defrosting. Sudden temperature changes cause stress on materials. If the sound occurs only when the compressor is turned on or off, most likely it is just physics and not a breakdown.
However, if the crackling noise becomes constant and does not depend on operating cycles, it is worth checking the temperature conditions. A set temperature that is too low can lead to constant freezing and fans operating at maximum speed, which increases noise.
⚠️ Attention: Do not set the temperature in the freezer below -18...-20°C unless necessary. This not only increases energy consumption, but also provokes increased formation of ice, leading to noise.
When you need to call a specialist
Despite the fact that many causes can be eliminated independently, there are situations when the refrigerator makes a sound like a cricket due to complex faults. If you have ruled out vibration, carried out defrosting, checked the fans, but the sound remains, the problem may lie in the refrigerant circulation system.
Clogging of the capillary tube or a freon leak can cause whistling-crackling sounds when gas under pressure passes through a narrow hole. It is also possible that the control electronics may fail when the valves do not open correctly. In these cases, professional diagnostics are required using pressure gauges and leak detectors.
- 🔧 The sound is accompanied by a lack of cold or weak cooling.
- 🔥 The compressor operates continuously, without shutting off, and gets very hot.
- ⚡ There is a burning or melted smell plastic along with sound.
Ignoring these symptoms can lead to complete failure of the compressor, the replacement of which is often not economically feasible. It is better to contact the service center at an early stage.
Frequently asked questions (FAQ)
Why does the refrigerator make a cricket sound only at night?
At night, the overall noise level in the apartment decreases, and you begin to hear sounds that were unnoticeable during the day. In addition, at night the voltage drops in the network may be smaller, which changes the nature of the compressor's operation, making its sound more distinct. Also, neighbors and street traffic are quieter at night.
Is it dangerous to ignore the sound of a "cricket" in the refrigerator?
If the sound is caused by vibration of pipes or ice, there is no direct danger, except for possible energy consumption. But if the reason is wear of the compressor or fan bearings, ignoring them will lead to their jamming and expensive repairs.
Can the sound of a cricket be a sign of a freon leak?
The freon leak itself is usually silent. However, if the pressure in the system has changed due to a leak, the gas, passing through narrowings or defects, can produce hissing or whistling sounds, which can be confused with a chirping.
How to distinguish the sound of a cricket from normal operation?
Normal operation is a smooth, monotonous hum. The sound of a "cricket" is a high-frequency, intermittent crackling or squeaking sound. If the sound irritates the ear and does not resemble the usual buzzing, then there is an anomaly in the system.