Why is the refrigerator humming and making noise? What to do and how to reduce the noise with your own hands?

No matter which model you have a refrigerator, the way it works is important. If the refrigerator is noisy, it is always unpleasant and raises concerns about its condition. But, even if the refrigerator is very humming or noisy, this does not mean at all that it has broken. Consider the causes of noise, the most common in practice, and methods for their elimination.

Incorrect installation of the refrigerator

The situation is simple and common - you bought a new refrigerator, put it in the kitchen, but the noise from it is like from the old one. What's the matter? The reason is simple: you could not check the horizontal and vertical position of the refrigerator. Due to the skew, the compressor may make noise, in contact with the housing with the pipeline or metal parts of other nodes. Or it may be that one of the adjustable legs of the refrigerator simply hangs in the air due to skew, and due to insufficient support, the unit body vibrates and makes unpleasant noises.

Remedy: How to reduce noise in this case? The position of the refrigerator is set using the usual spirit level (building level). If it is not, use a plumb line, which can be made from any thread and weight weighing 20-50 grams. But even with a strictly vertical / horizontal position of the case, check the points of contact of the legs to the floor. Perhaps the floor is uneven, and the leg that hangs in the air will have to be adjusted - for this the legs are threaded.

The compressor is out of air

The loud noise of the refrigerator from the fact that the compressor is operating in limited capacity is the second reason for the frequency of elimination. This is especially true for small-sized or furniture-laden apartments.

If you have moved the refrigerator too close to the wall; if the refrigerator is fitted with furniture that is pulled close; if a the back of the case (radiator) touches the wall or is too close to it, then air can access the condenser difficult. Therefore, it is not cooled sufficiently, creating an additional load on the compressor, which, in its the queue begins to make noise from overloads - the valve knocks, the engine vibrates, transmitting vibrations to other nodes. In addition, a layer of ice gradually builds up on the condenser, which can also touch other parts of the structure and make noise.

Remedy: In such a situation, you can reduce the noise of the refrigerator in understandable ways - move the unit away from the wall at least by 20 cm, remove furniture or other objects that are too close and clean the back wall the refrigerator. Remove a layer of dust, remove dirt from the compressor, condenser, radiator and piping, defrost the refrigerator so that frost on the condenser (if any) can be removed. Preventive maintenance work on the refrigerator should preferably be done at least once a month. All this can be done on their own without resorting to the help of a professional refrigerator.

Good to know:

• The reasons, why does the refrigerator flow inside and out. How to fix the problem?
• Device and refrigerator operating principle. How does a refrigerator work?
• How to remove the smell from the refrigerator at home: https://sovetexpert.ru/kak-ubrat-zapax-iz-xolodilnika.html

Compressor housing is loose or loose

But what if the refrigerator makes noises or extraneous sounds all the time, but all of the above methods do not help? Check if the compressor is firmly fixed in its seat.

Remedy: In older models, the compressor is suspended on springs - their weakening or displacement to the side can cause noise from the contact of the engine housing with the metal of other parts. The piping from the refrigerator to the radiator is a good sound resonator. The refrigerator buzzes very much if the rubber gaskets under the compressor case have become leaky - crumpled or burst. Springs or gaskets must be replaced.

Faulty refrigerator fan

If the unit is very loud, check the condition of the refrigerator fans. This applies only to models with the No Frost system - even two fans can be installed in them. One is for cooling the evaporator of the refrigerator, the second is for cooling the evaporator of the freezer.

Your refrigerator is noisy - what to do to find the cause? With constant temperature fluctuations, the lubricant in the bearings of the electric motor dries, and the refrigerator humming much from the vibrations of the fan. Also, ice on the evaporator, which may be formed as a result of poor operation of the heater or its breakdowns, increases over time, and the fan blades begin to cling to it, and the refrigerator - much to buzz.

Remedy: First get rid of the ice crust on the evaporator - this can be done with your own hands. Then check for grease in the fan bearings, add it. The bearings will most likely be bronze or brass, so lubrication is very necessary for them.

Malfunction of electrical circuits

The next reason why your refrigerator started to make extraneous noise is a malfunction of the electrical part.

1. When the start-up relay fails, the refrigerator behaves aggressively - when turned on, it abounds, growls, and sharply turns off after a few seconds.

Elimination: replacing the relay - for this you will have to use the services of a professional if you yourself can not cope.

1. The windings of the fan motor burned out - another reason why the refrigerator began to make a lot of noise when turned on.

Elimination: Check the windings with a tester for short circuit or for leakage of resistance to the motor housing. In both the first and second cases, the engine will have to be changed. Although there are cases when a leak on the body is enough to dry the engine well, and infinite resistance will be restored.

1. Another reason why the refrigerator is noisy - the compressor motor burned out. You can check this by touching the case. You can hold your hand on a working compressor - it is not too hot, but just warm. If the case is overheated, then you need to check the engine.

Eliminating the cause of noise: Same as with the fan. But it will not be possible to dry the engine - it is pressed into the compressor, therefore it is only a replacement.

1. The evaporator heater burned out - this is the next reason why the refrigerator is noisy. Ice on the surface of the evaporator interferes with the normal operation of the compressor - in high load mode, the noise from the engine will be strong.

That's why the refrigerator is buzzing - the position of the valves and piston is violated, but the crankshaft continues to rotate, causing the refrigerator to make grinding and clanging sounds.

Troubleshooting: Check the heater for proper operation - this can be done by a tester of the circuit with a tester for an open. If the heater burned out, you can replace it yourself.

Clogged pipeline

What if the refrigerator continues to make noise and what else could be the problem? The choke and filter of the unit are usually clogged. This is expressed in a decrease in the production of cold and an increase in the load on the compressor, so the refrigerator makes noise and knocks along with the compressor.

Elimination: Only call the refrigerator, as special equipment is needed to eliminate the blockage.

Refrigerant overdose

Why is the refrigerator knocking? When filling the unit pipeline with refrigerant (this may be necessary), the refrigerator may mistakenly add an extra volume of freon. This will lead to the fact that the productivity of the production of cold will significantly decrease, but this problem is easily solved by bleeding the refrigerant.

In such cases, you just need to follow up for 2-3 hours how the refrigerator works, and ask the master (if necessary) to release the refrigerant.

Video instruction

A short video tutorial on how to quickly and cheaply eliminate one of the causes of the noise that a refrigerator can make. In the example, the cause of the noise was the mechanical contact of the pipeline with the body and radiator of the refrigerator. Due to the large area of ​​the vibrating radiator, the noise was clearly audible, especially at night.

If you buy a branded model when choosing a refrigerator, you will be satisfied that the compressor runs silently and the refrigerator does not knock. Even when all functions are turned on immediately in new refrigerators, the noise level will be significantly lower, and the unit will work more reliably and longer than cheaper models.