A situation when the Ariston Hotpoint refrigerator suddenly begins to hum strongly can unbalance any owner. In the silence of an apartment at night, this increasing low-frequency hum seems especially annoying and often signals a malfunction. However, do not panic ahead of time, since modern models Ariston Hotpoint can make sounds due to design features or improper installation.
The first thing to do when extraneous noise appears is to carry out an initial diagnosis. It is important to determine the nature of the sound: is it a smooth hum, an intermittent knock, or a high-frequency whistle? The further algorithm of actions directly depends on this. In most cases, the problem can be localized on your own, without resorting to an expensive call to a technician right away.
In this article, we will analyze in detail why the Ariston Hotpoint refrigerator is humming, and consider typical malfunctions of the compressor, defrost and ventilation systems. Understanding the physics of the processes inside the unit will help you distinguish the normal operation of equipment from a critical breakdown that requires immediate intervention.
Normal operating noise or a sign of breakdown?
Many users mistake the normal functioning of the equipment for a malfunction. Modern refrigerators Hotpoint Ariston with system No Frost are equipped with fans and a complex refrigerant circulation system, which inevitably creates background noise. If the hum appears cyclically and lasts for a certain time, this may be normal operation.
Especially often, owners encounter noise after defrosting or the first load of food. During this period, the compressor operates at maximum speed in order to quickly reach the set temperature. If the refrigerator hums smoothly and quietly, and the temperature inside the chamber is stable, most likely the equipment is working. The alarm should be sounded only if there is a sudden change in the nature of the sound or the appearance of vibrations.
The age of the device should also be taken into account. Older models may make a louder noise due to wear on the rubber seals and natural aging of the oil in the compressor. New units can make noise during the “break-in” period until all the moving parts rub against each other.
Installation problems and vibration of the case
The most commonplace, but common reason why the Ariston Hotpoint refrigerator hums is incorrect installation. If the body of the equipment is skewed or touches walls, furniture or other objects, the vibration from the running motor is transmitted to them, increasing significantly. This creates a resonance effect, which is perceived as a strong hum.
Check the horizontal installation using a building level. The legs of the refrigerator must be unscrewed so that the unit stands stable and does not wobble with a slight push. It is also important to provide a gap between the back wall of the refrigerator and the wall of the room - usually at least 5-7 cm is required for free air circulation.
Pay attention to objects nearby. Even lightly touching the hose leading to the drain or a nearby cutting board can cause a rattling sound. Make sure that bottles and containers inside the chambers do not come into contact with the walls and with each other.
☑️ Diagnostics of refrigerator installation
Compressor malfunctions and starting relay
If installation problems are excluded, then the main source of noise is compressor. It is he who is responsible for the compression and circulation of the refrigerant. Models Ariston Hotpoint can use both conventional piston and quieter inverter compressors. If an old piston motor is humming, this often indicates that the bearings or piston group have reached the end of their service life.
Another critical part is the starting relay. If this element fails, the compressor may try to start, make a loud clicking and humming noise but not start, or may run rough and loud. In such cases, it is often necessary to replace the relay or the motor itself.
You should also check the compressor mounting. Over time, the rubber shock absorbers on which it is suspended may dry out or burst. As a result, the metal housing of the motor begins to vibrate against the frame of the refrigerator, creating a characteristic metallic hum.
⚠️ Attention: Replacing the compressor or start relay yourself requires special skills and tools for working with freon. Unprofessional intervention can lead to a gas leak and final breakdown of the unit.
To diagnose the condition of the motor, you can use the table of symptoms:
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Uniform low hum | Normal operation or poor installation | Check the legs and clearances |
| Loud knocking and humming | Wear of the piston group | Master diagnostics |
| Humming with clicks | Malfunction of the starting relay | Replacing the relay |
| Vibration of the body | Destruction of shock absorbers motor | Replacing rubber suspensions |
Noise of the defrost system and No Frost fan
In refrigerators with a system No Frost the fan is responsible for the circulation of cold air. If you hear a humming sound that turns into a crackling or whining noise, especially when the compressor is off or running quietly, this is most likely the problem. The fan blades may touch ice formed due to a violation of the defrost cycle.
Ice freezing on the evaporator is a common reason why the Ariston Hotpoint refrigerator hums. This may occur due to a malfunction of the defrost heating element, defrost sensor or timer. Ice narrows the space, and the fan begins to work under load, making unpleasant sounds.
Also, the rotating elements may simply wear out. Fan bearings lose lubrication over time, causing increased friction and noise. In some cases, it is enough to remove the back panel of the freezer, defrost the unit for a day and clear the ice from the fan.
How to check the fan without disassembling?
In some models, you can carefully (without touching the blades!) stop the fan with your finger through the grille for a split second. If the noise disappears, that is definitely the problem. Be careful!
The influence of refrigerant and capillary tube
Sounds made by refrigerant moving inside the tubes are often described as gurgling, hissing or a quiet hum. This is absolutely normal for a working refrigerator Hotpoint Ariston. However, if the sound becomes loud, whistling, or resembles the sound of running water under high pressure, this may indicate problems.
One of the reasons may be a freon leak. When the amount of refrigerant decreases, the compressor is forced to work longer and harder in an attempt to maintain the temperature, which is accompanied by a change in the background sound. Also, if there is a leak, a whistle may appear at the gas outlet.
Another factor is a clogged capillary tube. If a plug forms in the circulation system, the refrigerant cannot move freely, creating excess pressure and the characteristic pumping noise. This is a complex malfunction that requires purging the system and replacing the filter-drier.
⚠️ Attention: If you smell chemicals or oil near a working refrigerator, immediately unplug the appliance and ventilate the room. This could be a sign of a serious refrigerant leak.
What to do if your new refrigerator is humming?
Buying new appliances does not always guarantee perfect silence. If your new Ariston Hotpoint refrigerator is humming, first make sure that all shipping bolts have been removed. Although they primarily secure the compressor during transport, their presence or improper removal can affect vibration.
Let the technique “settle.” After delivery, the refrigerator must stand upright for 4 to 8 hours (depending on the time of year and method of transportation) before turning on. This is necessary so that the oil in the compressor flows into the crankcase and falls into place.
The first start-up may be noisy. The unit will work without stopping until it cools the entire volume of the chambers to the specified parameters. During this period, the hum may be stronger than usual. If after 24 hours of operation in normal mode the noise does not subside, you should contact a service center.
Frequently asked questions and answers (FAQ)
Why does the refrigerator only hum at night?
At night, the level of background noise in the apartment decreases, and the operating compressor becomes more audible. Also, at night, the voltage in the electrical network may drop, which causes the motor to work harder and hum louder.
Is it possible to lubricate the compressor so that it stops humming?
No, modern refrigerator compressors Ariston are sealed. The lubricant is located inside in a closed circuit. An attempt to drill a hole for lubrication will lead to an instant leak of freon and breakdown of the unit.
The humming stops if you press the wall of the refrigerator with your hand. What does this mean?
This indicates vibration of the metal sheet of the case or internal panel. At the point of pressing, additional resistance arises, dampening vibrations. It is recommended to check the fastenings of the internal panels and shelves.
Is it dangerous to continue to operate a humming refrigerator?
If the humming is accompanied by heating of the motor, lack of cold or a burning smell, it is dangerous to operate. If it is just increased noise while maintaining all functions, the unit can work for a long time, but diagnostics must be carried out.