An unpleasant roar that occurs when the washing machine reaches maximum speed can unsettle any owner. This sound often indicates a serious mechanical problem, which, if ignored, can lead to costly repairs or complete replacement of the unit. If you hear knocking, grinding or humming noises, it is important to immediately stop use and carry out initial diagnostics.
The reasons for the occurrence of extraneous noise vary from a coin simply forgotten in a pocket to critical wear and tear bearing unit. In some cases, you can fix the problem yourself, armed with a minimal set of tools; in others, professional intervention will be required. Understanding the nature of sound can save time and money by allowing you to accurately describe the problem to a technician or decide to repair it yourself.
In this article we will analyze in detail all possible sources of noise, from simple ones to eliminate to complex technical breakdowns. You will learn how to distinguish the knocking of bearings from the vibration of heating elements, what to do if a bra bone gets into the drum, and how to check the condition of the shock absorbers. Timely response changes in the operation of equipment extends its service life.
Linen imbalance and installation problems
The most common and easily eliminated cause of knocking is the uneven distribution of things in the drum. If you have loaded one heavy item, such as a wet blanket, or only pulled part of the laundry out of the wash, the center of gravity shifts. When rotating at high speeds, this imbalance causes strong vibration, due to which the body of the machine hits the walls or floor, creating a characteristic roar.
In addition, it is worth checking that the unit is installed correctly. The washing machine must be positioned strictly horizontally. If the legs are not adjusted, the body is skewed, which increases the beating during the spin cycle. Also check that the shipping bolts that secure the tank during transport have been removed. Their presence makes normal operation impossible and leads to the destruction of units.
☑️ Check before starting the spin cycle
Sometimes the problem lies not in the machine itself, but in the surface on which it sits. Slippery tiles or linoleum contribute to the “jumping” of equipment. In such cases, it is recommended to use a special anti-vibration mat or footrests. This simple solution often eliminates noise associated with the case hitting hard surfaces.
⚠️ Warning: If the machine vibrates or knocks a lot, do not try to hold it with your hand or foot while operating. This may result in injury or electric shock. Stop the cycle and redistribute the laundry.
Foreign objects in the tank and drainage system
A common cause of metallic ringing or rhythmic knocking is small objects caught in the space between the tank and the drum. When the drum rotates, coins, buttons, keys or small items forgotten in pockets are thrown up and fall down with force, making a loud sound. This can be heard especially well during spinning, when the rotation speed is maximum.
Bra wires are especially dangerous. When they bend, they can get stuck in the holes in the drum or get caught in the drain pump. If an object gets stuck in the pipe or pump, you will hear not only a knocking sound, but also a humming sound, and the machine may stop draining water. In the worst case, a sharp object will pierce the rubber seal or damage plastic tank.
How to get a small object without disassembling the car
If an object is visible through the holes in the drum, try carefully removing it with long-nose pliers after unplugging the machine. You can also try tilting the machine and shaking the tank so that the object falls into the lower part, accessible through the drain filter hatch. However, if the item has gone deep, partial disassembly of the unit will be required.
To prevent items from getting caught, always check your pockets before washing and use special bags for delicate fabrics with small fittings. Regular cleaning of the drain filter also helps to detect small objects that have already entered the system, but have not yet caused a breakdown.
Wear of the bearing unit and oil seal
If, when accelerating, the car emits an increasing hum, turning into a roar, and then into a metallic knock, the bearings are most likely faulty. This is one of the most serious breakdowns. Bearing unit ensures smooth rotation of the drum, and its destruction leads to shaft play. First there is noise, then vibration, and eventually the drum can jam or break the tank.
You can diagnose this problem by opening the hatch door and shaking the drum with your hand (in the off state). If vertical play is noticeable or a crunching sound is heard when scrolling, the bearings require replacement. Also a sign is rusty water flowing out during spinning - this means that the oil seal is leaking water, washing out the lubricant and causing corrosion.
| Symptom | Probable Cause | Required actions |
|---|---|---|
| The hum is growing faster | Bearing wear | Replacing the bearing assembly |
| Metal clink | Foreign object | Retrieving an Item |
| Knock at the beginning of the spin cycle | Linen imbalance | Redistributing things |
| Rusty stains on linen | Seal destruction | Urgent replacement of the seal |
Replacing bearings is a labor-intensive process that requires complete disassembly of the machine and often replacement of the entire tank assembly if it is not dismountable. In models with a collapsible tank, new bearings can be pressed in, but this requires special pullers and skills. You cannot delay repairs: a damaged bearing can rotate the shaft, damaging the drum cross.
Heating element malfunctions and loose fastenings
The heating element (heating element) is attached to the tank and may move slightly during operation. Over time, scale deposited on the heating element may break off in pieces. These hard pieces of limescale fall to the bottom of the tank and begin to knock against the metal parts during the spin cycle. The sound resembles a clattering or clanging sound, which intensifies as the drum rotates.
Another reason is the weakening of counterweights. These are heavy concrete or cast iron blocks that are attached to the front and back of the tank to dampen vibration. If the mounting bolts are loose, the counterweight begins to hit the body of the machine, producing a dull, heavy knock. In some cases, the concrete block itself may crack, which also causes noise and imbalance.
To eliminate a problem with a heating element, it is often enough to carry out preventive cleaning of the machine from scale with special means. If the problem is in the counterweights, you need to remove the top cover or back wall of the machine and check the tightness of all bolts. If cracks are found in concrete blocks, they should be replaced, since gluing will not give the desired effect.
⚠️ Attention: Before checking the internal fasteners and heating element, be sure to disconnect the washing machine from the power supply. Even after switching off, a dangerous charge may remain in the capacitors.
Problems with shock absorbers and springs
The washing machine tank is suspended on springs and rests on shock absorbers that dampen vibrations during the spin cycle. If the shock absorbers are worn out, have lost their tightness or “leaked”, the tank begins to hit the bottom of the housing hard. This is accompanied by a loud knock, especially when the drum accelerates or when the direction of rotation changes.
You can check the condition of the shock absorbers by pressing the tank from top to bottom through the open hatch. If the tank moves easily, as if on jelly, and does not return to its original position smoothly, but jumps, the shock absorbers are faulty. It is also worth inspecting the suspension springs: if they are stretched or come off, the tank warps and touches the walls of the housing.
Replacing shock absorbers is usually not difficult for those who have basic repair skills. However, it is important to select parts that match the weight of the laundry being loaded and the model of the machine. Installing shock absorbers that are too hard will transfer strong vibration to the floor, and installing shock absorbers that are too soft will cause the tank to wobble.
When replacing shock absorbers, replace them in pairs, even if the second one looks good. They have the same resource, and failure of the second element is only a matter of time.
Pulley and drive belt defects
A pulley is a wheel through which the motor transmits rotation to the drum. If the pulley mounting bolt is loose, it begins to play and knock. The noise may also be caused by the drive belt itself. If it is stretched, has abrasions, or small debris is stuck on the inside, a slapping or whistling sound will be heard during operation.
In machines with direct drive (without a belt), the situation is different: there the engine is attached directly to the tank. Knocking in such models is often associated with a malfunction of the motor bearings or control module, which does not properly regulate rotation. Diagnostics of the electronic module requires special equipment and knowledge.
Regularly inspecting the belt for cracks and stretching helps to avoid sudden breakdowns during washing. If the belt shows signs of severe wear, it is better to replace it preventively, since its breakage can wrap around the motor shaft and cause more serious damage.
Timely replacement of a worn belt and checking the pulley tension prevents drum beating and prolongs the life of the engine.
Is it possible to continue washing if the machine is knocking?
Short-term operation is only possible if the cause is unbalanced laundry. If the knock is caused by wear of the bearings, shock absorbers, or the entry of a foreign object, further operation will lead to destruction of the tank or shaft. This will turn a minor repair into a replacement of the entire machine.
Why does the machine knock only when spinning?
When spinning, the drum develops maximum speed (up to 1000-1600 rpm). Any play, imbalance or loose fastenings at such speeds cause resonance and strong shocks, which are not noticeable at low speeds when washing.
How much does it cost to replace bearings in a washing machine?
The cost consists of the price of spare parts (bearings, oil seal, possibly a tank) and the work of the technician. In non-separable tanks, the tank and drum assembly are often replaced, which can account for up to 70% of the cost of a new machine. In collapsible models, repairs will be cheaper.