The situation when Bosch washing machine He stops spinning the drum, catches any hostess by surprise. Instead of the usual hum of water and rhythmic rolling of laundry, the device either remains silent or makes strange sounds, but the washing process does not begin. This can happen at any point in the cycle: when you are dialing water, during the main cycle, or even during the spin stage. Understanding the nature of a breakdown is the first step to a successful and not too expensive repair.
Often the owners of the equipment Bosch They panic ahead of time, believing that an expensive engine or electronic module has burned down. However, the statistics of service centers say the opposite: in many cases, the problem lies in mechanical components or worn consumables that can be replaced on their own. In this article, we will explain in detail why wash-driver loses mobility, how to conduct the primary diagnosis and when it is really necessary to call the master.
Before starting to disassemble the unit, it is important to exclude banal, but often ignored reasons. Check if it's stuck. kick-offWhether the program is correctly selected and the water supply tap is open. If external factors are excluded, and Bosch technique It still doesn’t work, you will need a deeper immersion in the device. Don’t ignore the error codes on the display – they are the key to quickly localizing the problem.
Mechanical locking and foreign objects
One of the most common reasons for stopping the drum is the banal getting stuck in a foreign object. A bone from a bra, coin or button can get into the gap between the tank and the drum. This creates a mechanical obstacle that electric motor It just can't get over it. In such cases, the machine may hum trying to turn the shaft, but rotation does not occur.
To test this theory, try manually spinning the drum when the machine is off the network. If it rotates with difficulty, jerks, or gnashes, the problem is almost certainly in the foreign body. It is also worth a careful look. drain-pump (pump), as small objects often get stuck there, blocking the drainage of water and, as a result, moving to the next stage of the cycle, where rotation is required.
Sometimes the blockage is not caused by the object, but by excessive loading of laundry. If you put too many heavy things in, motor It may not be able to handle the inertia of the mass, especially at the start. In modern models Bosch It has an imbalance sensor that can block rotation if things get lost in one lump.
Before each wash, check your clothes pockets and fasten the zippers - this will save not only the drum, but also the drain pump from expensive repairs.
To eliminate the stuckness, it is often enough to remove the top cover of the machine and, tilting the tank, try to extract the object through the top. In more difficult cases, you will have to disassemble the car in front or behind to access the space between the tanks. The main thing is to act carefully so as not to damage the hatch cuff or the heating element.
Problems with the drive belt and pulley
In models Bosch Direct-drive belt is absent, but in the classic versions it transmits the rotation from the engine to the drum. If the car is buzzing, the engine is working, but the drum is standing still, the first thing to check is drive-belt. Over time, it stretches, cracks or even flies off the pulley. A visual examination through the back wall (if it is transparent or removed) will immediately give an answer.
If the belt is intact but slipped, the cause may be wear and tear. pulley Or a drum pulley. Dirt, oil or production on the surface of the pulley reduces traction, and the belt begins to slip. As a result, the engine turns idle, without transferring the force to the tank. It is also worth checking the tension: too weak belt will not ensure normal rotation at high spin revs.
Replacing the belt is a simple procedure, but requires care. The new consumable must correspond exactly to the marking of the old one. When installing a new belt, it is important to properly pull it and check the alignment of the pulleys. If the pulley of the drum has a backlash or is damaged, it will also have to be replaced, otherwise the new belt will quickly become unusable.
☑️ Diagnostics of belt transmission
It is worth noting that a belt break is often the result of another problem, such as the spelling of bearings. Therefore, before installing a new belt, be sure to make sure that the drum rotates freely from the hand. If you put a new belt on jammed bearings, it will burn or break in the first minutes of operation.
Wear of electric motor brushes
Graphite brush - this is the consumable material of collector engines, which are installed in most models Bosch. They press against the collector of the engine spring and transmit electric current to the winding of the rotor. Over time, the graphite is erased, the brushes shorten and cease to contact the collector closely. As a result, the engine either stops starting, or works intermittently and does not develop the desired power.
Symptoms of brush wear often appear gradually. First, the machine may be worse at pressing out the laundry, then sparks appear inside the motor (sometimes seen through the vents), and eventually the rotation stops completely. If you hear a crackle or see sparkling and the drum is not spinning, the likelihood of brush wear is extremely high.
The process of replacing brushes requires disassembly of the engine. It is necessary to remove the engine, get to the brush holders and replace the graphite bars with new ones. It is important to rub new brushes to the shape of the collector, otherwise they will sparkle and burn quickly. Some craftsmen recommend changing brushes prophylactically every 3-5 years of active use to avoid sudden breakage.
⚠️ Warning: When replacing brushes, be sure to disconnect the washing machine from the power grid! Residual voltage or accidental switching on may result in an electric shock or short circuit.
In addition, when replacing brushes, it is worth checking the state of the collector. If there are grooves or grooves on his lamellae, they must be cleaned. Deep manifold output may require the entire engine to be replaced, as new brushes simply won’t have enough contact with the surface.
How to check the wear of brushes without disassembly?
If your model has access to the brushes on the bottom or back, you can try to estimate their length visually. If the graphite is more than 70% of its original size, replacement is required. Also a sign of wear is the characteristic smell of burning and increased sparkling in the area of the motor during operation.
Failure of the heating element (TEN)
Many users are surprised to learn that because of the burnt-out TEN. (the heating element) may stop the drum. Logic of work Bosch washing machine The system is constructed so that if the water does not heat up to a given temperature for a certain time, the control module can block the further cycle, including the rotation of the drum, to prevent damage to the laundry or violation of the washing technology.
Diagnosis of TEN is carried out using a multimeter in the mode of measuring resistance. The normal resistance of a serviceable heater is from 20 to 50 ohms. If the device shows infinity (break) or zero (short circuit), the element must be replaced. Also, the TEN can "pierce" the body, which causes the protection to work and the machine to stop.
The replacement of the TEN is usually done through the lower part of the machine or after removing the front panel. When installing a new element, it is important to carefully clean the landing place of scale and check the condition of the rubber gasket. Poor tightness will lead to leaks, which can cause much more serious electronics problems.
| Malfunction | Symptoms. | Probability. | Difficulty of repair |
|---|---|---|---|
| Foreign subject matter | Screaming, humming, stop. | Tall. | Medium |
| Belt break | The engine's humming, the drum's standing. | Tall. | Low. |
| Wear of brushes | Sparks, cracks, weak start | Medium | Medium |
| Tan burnt. | No heating, cycle stop | Medium | Low. |
| Module malfunctioned. | Lack of reaction, errors | Low. | Tall. |
Bearing assembly failure
If the drum rotates tightly, with a characteristic hum resembling the sound of a soaring aircraft, or has a strong backlash when swaying with your hand, it is a failure. bearing. This is one of the most serious mechanical failures. Water with detergent gradually washes out the lubricant, and the metal elements begin to third against each other, breaking down.
Operation of a machine with defective bearings is strictly prohibited. A collapsing bearing can lead to depressurization of the tank, damage to the engine shaft and even destruction of the tank itself. In modern models Bosch Bearings are often pressed into a non-shatterable tank, which requires its complete replacement or a complex process of overpressing in the workshop.
Diagnosing the problem can be done by removing the belt and twisting the drum manually. If a crunch is heard or a shaft is felt, the diagnosis is confirmed. Replacement of bearings requires complete disassembly of the machine, extraction of the tank and the use of special removers. This is a time-consuming process that requires special tools and skills.
The hum and backlash of the drum are signs of critical wear of bearings that require immediate intervention, otherwise repair may become economically inexpedient.
To extend the life of bearings, use special means to soften the water and do not overload the machine. Regular filter cleaning and use of quality powders also reduces the aggressive impact of the environment on the machine nodes. Prevention is always cheaper than major repairs.
Electronic control board and module
If the mechanical part is in good working order, the belt is intact, the engine is spinning (idle), and the drum is not moving, the problem may lie in the "brains" of the machine. control module. The board controls the supply of voltage to the engine, TENG and pump. Power surges in the network, moisture ingress or factory defect can disable symistors, relays or other components of the board.
Symptoms of the module malfunction are diverse: the machine can turn on, draw water, but do not start washing, or randomly change modes. Often, error codes appear on the display indicating engine problems (e.g., series errors F21, F22, F23 depending on the model). Bosch), although the engine itself may be in good working order.
Repairing the control module requires professional knowledge in electronics. It is necessary to ring the tracks, check the elements on the break and replace the burned parts. In some cases, flashing helps, but more often, a physical replacement of components or the entire board is required. Self-repair without the scheme and equipment is extremely difficult and risky.
⚠️ Warning: Attempting to repair the electronic board without appropriate qualifications can lead to the final failure of the machine and loss of warranty.
Diagnostics by error codes
Modern. Bosch washing machines They are equipped with a self-diagnosis system. If a fault occurs, the error code is displayed on the display, which greatly simplifies the search for the cause. These codes cannot be ignored – they directly point to the node that needs attention.
The most common codes associated with the rotation of the drum:
- F21 - Engine error. The motor does not rotate or rotates at the wrong speed. Causes: wear of brushes, break of chain, malfunction of the tachodilator.
- F22 - Engine lock. Often indicates problems with the electronics of the engine control or jamming.
- F23 - Rotation direction sensor (NTC) error. Problem with electronics or wiring.
- E18 (or F18) - Plum problems. The machine has not drained water and cannot go to spin (rotation at high revs).
For accurate decoding of codes of a particular model Bosch It is better to refer to the instructions or technical passport. Knowing the code, you can cut off the extra options immediately and focus on checking a specific node, saving time and money.
The secret to resetting errors
Sometimes the error is temporary (a tension surge). Try to disconnect the car from the network for 15-20 minutes. If the problem was a software failure, the system will restart and the error will disappear. If not, repairs are required.
Frequently Asked Questions (FAQ)
Why doesn't the drum spin when pressed, but spins when washed?
This may indicate wear of the engine brushes (lack of power for high revs), a malfunction of the tachodilator (the machine does not "see" the rotation speed) or a problem with the control module, which does not give a command to increase revs. There may also be an imbalance of laundry.
Can I start the car if the bearing is jammed?
Absolutely not. Working with a jammed bearing will lead to engine combustion, belt breakage and possible tank destruction. This is the way to overhaul or buy a new car.
How long does the engine in a Bosch washing machine last?
With proper operation and timely replacement of brushes (every 5-7 years), the engine can last 10-15 years or more. The main enemy of the engine is overheating and moisture.
Why is the car buzzing but not spinning?
Hooding means that the voltage on the engine is applied, but there is no rotation. Causes: a jammed bearing, a stuck foreign object, a jammed pump or a fly-up/teared drive belt.