Error F21 in a Bosch washing machine: causes and remedies

Any defect in the automatic washing machines will be shown on the display, if it is present in the used model. For simpler devices, information is displayed using indicators. Often, users of Bosch washing machines are faced with the F21 error and do not know what to do with it. To understand this issue, you need to study the main causes of the error and ways to eliminate it.

If your Bosch washing machine shows error code F21, experts recommend immediately disconnect the unit from the power supply. Then you need to use the help of a wizard who can repair the faulty device. It is not recommended to try to eliminate the causes of the malfunction on your own, but you can always find out what such an error means.

The machine can demonstrate this code not only in the form of an alphabetic and numeric set. As described at the beginning of this article, models without a display will report the problem through a combination of blinking lights located on the control panel. An error can be detected without a display using the following symptoms:

• the machine freezes and stops responding to button presses;
• also, the device does not react to turning the selector, with which you can select the desired program;
• on the control panel the indicator "rinse", "800 rpm", "1000 rpm" will light up.

At first, the unit will try to start it on its own, but after unsuccessful attempts it will show an error.

There may be several reasons for this phenomenon.

• The tachometer is out of order. If this problem occurs, the engine speed data is no longer sent to the control module. Because of this, it stops working, and the user may see the F21 error.
• Damage to the motor. Due to this, the rotation of the drum becomes unavailable. As a result, after several attempts to start the engine, an error appears.
• Open circuit of the power supply to the tachograph or engine. A similar phenomenon can occur when there is a break in the wiring or if the contacts are oxidized. In this case, the engine itself with the tachograph will be in good order.
• Voltage drops.
• Foreign object entering the tank, due to which the drum is jammed.

Before you reset such an error, you need to decide why it appeared. There are several variations of scripts with which you can fix the breakage code. Usually, troubleshooting begins from elementary actions to complex ones, one by one... Need to act by elimination method.

If you try to turn the drum with your hands while the machine is turned off, a foreign object will knock or rattle, interfering with the scrolling. Several steps are required to remove the foreign object.

• First of all turn the unit so that there is unhindered access to the AGR.
• If there is a service hatch, it will need to be opened. Otherwise, you will have to resort to dismantling the fasteners and the back wall.
• Then you need disconnect the wires that lead to the heating element.
• The heating element itself is also pulled out of the body part... At the same time, you can descale it.

Due to perfect manipulations, a small hole will appear through which a foreign object can be pulled out. This is done with a special device or by hand.

This is a dangerous phenomenon that adversely affects equipment. Power surges can lead to the fact that further use of the machine will be impossible. Eliminate breakdown in the future will help purchase of a voltage stabilizer. It will prevent the occurrence of such risks.

If the cause of the malfunction in the Bosch washing machine is a malfunction of the tachometer or Hall sensor, the following procedures are required.

• It is necessary to unscrew the rear wall of the unit, remove the drive belt. The second step will be required so that nothing interferes during the repair.
• In order not to get confused in the location of the wiring with fasteners, it is recommended take pictures of them before taking them off.

Then you can just push on the body part and lower it. With these simple steps, removing the motor will be quick and easy.

Hall Sensor located on the body of the engine. Therefore, after the motor is dismantled, the tachograph will only have to be removed and carefully examined. Sometimes there is oxidation or lubricant on the inside of the ring. If such a phenomenon is found, it should be eliminated. After that, you need to use a multimeter that will report the status of the sensor.

Most often, electric brushes fail. This part cannot be repaired, so you will need to buy new ones. Masters advise buying original components and replacing a pair at once. The replacement process itself is easy, an ordinary user can handle it. The main difficulty is in the correct choice of the details themselves.

In this way, you can use a sample to be sure that the selected part will be suitable.

Also, on a Bosch washing machine, error F21 may appear due to the fact that a breakdown of the winding turns has occurred in the engine. Due to this, there is a leak directly to the housing of the unit. You can determine a malfunction of this kind by using a multimeter. In most cases, when such a malfunction is detected, it is recommended to buy a new engine, since repairing an old one will cost a lot and has many difficulties.

Some users are interested in information on how you can reset the F21 error yourself. However, not every person knows why it is generally necessary to reset the error, because there is an opinion that it will disappear on its own after the cause of the breakdown is eliminated. This opinion is wrong. The code will not disappear on its own even after the repair, and the blinking error will not allow the washing machine to start working. Therefore, professional masters recommend using the following recommendations.

• First of all, you need to turn the program selector to the "off" mark.
• Now you should turn the selector for switching to the "spin" mode. You will need to wait a bit until the error code information appears on the screen again.
• Then you should hold down the key for a few seconds, with the help of which the drum turns are switched.
• Next, the selector switch should be set to the "drain" mode.
• It is worth holding down the speed switch button for a few seconds.

If, after the above actions, all indicators start blinking, and the machine beeps, then the error has been cleared successfully. Otherwise, you will need to repeat all the manipulations again. It is possible to exclude the appearance of such an error with the help of regular diagnostics of the washing machine, installation of a voltage stabilizer, as well as checking the pockets of clothes and a more attentive attitude to the contents of the drum.

See the video for the causes of error F21 and how to fix them.