Bosch washing machine - error F21

Repair
CONTENT

Errors E1 and 4C on a Samsung washing machineIf error F21 appears in a Bosch washing machine, technicians advise immediately disconnecting the machine from the electrical network. After this, call a specialist who will fix the problem. It is unsafe to search for and fix the problem yourself, as there is a chance of getting an electric shock. But don’t get scared ahead of time. Let's find out what this error means and what needs to be done when it occurs.

 

Description

 

At operation of Bosch equipment error F21 may appear not only in the form of a code of letters and numbers. On Bosch models that do not contain a display, the fault is indicated by a combination of flashing indicators located on the control panel.

Flashing indicators allow you to recognize a number of errors. Technicians who have extensive experience working with similar washing machines determine error code F21 offhand. But an ordinary user can also identify an error using indicators. To do this you will need a table of error codes.

On Bosch washing machines Without a display, error F21 is displayed as follows. The washing machine freezes and does not respond to button presses. Also, the machine does not respond to turns of the program selector. At this moment, 3 lights on the control panel flash or light up at once: rinse, 800 revolutions and 1000 revolutions.

You can see how the F21 code is displayed on Bosch machines without a display in the picture below.

2 comments

Older models spin at a maximum of 800 rpm.In this case, the rinse, 600 and 800 rpm indicators will light up.

Code F21 has a fairly simple interpretation. However, this does not mean that determining the causes of its occurrence will be easy.

Code F21 indicates that in Bosch technology drum does not rotate. Before displaying code F21 on the control panel, the Bosch washing machine attempts to start the drum. And if this fails, then the corresponding code F21 appears.

This error may appear if the following malfunctions occur:

  • tachometer failure. With this malfunction, information about the speed of the washing machine motor is not sent to the control module. As a result, it stops the Bosch machine from working, and then displays error code F21;
  • engine malfunction. A broken motor cannot rotate the drum. Therefore, after several unsuccessful attempts to start the engine, the module displays error F21;
  • The circuit supplying the tachometer or motor has broken. This malfunction occurs when the wiring is broken or the contacts are oxidized. The motor and sensor are in good condition;
  • During the washing process, a foreign object may enter the tank of a Bosch machine and cause the drum to jam.
Also, the F21 code may appear when the voltage in the supply network drops.

Hall sensor failure

After finding out the possible reasons for the appearance of error code F21, the question arises of how to quickly detect and fix the problem without resorting to the help of a technician.

It should be noted that there is no universal way to find a breakdown.

You need to check the above reasons in a sequence convenient for you until the malfunction is identified.

First, let's figure out how to check the Hall sensor.The first difficulty you will encounter when performing this work is the inaccessibility of the tachometer and the motor of the Bosch washing machine.

You can get to these elements of the washing machine as follows:

Repair

  1. Disconnect the washing machine from the power supply;
  2. Pull the equipment out to a free space;
  3. Remove the back wall of the Bosch machine body;
  4. Remove the drive belt;
  5. Take a photo of the location of the fasteners and wires. This is necessary so that nothing gets mixed up during assembly;
  6. Remove the washing machine motor.

Before removing the engine, you must first disconnect all the chips with wiring from it. Next, you need to unscrew the bolts holding the motor, press on its body. It will move forward a little. Then you need to carefully pull it down.

On the motor body there is a tachometer . It is necessary to inspect the inner surface of the Hall sensor ring. If there are traces of grease and oxidation on it, they should be removed. Then we check the tachometer with a multimeter. If it burns out, then we replace it with a new one.

Motor malfunction

Models of Bosch washing machines of Russian assembly quite often experience serious problems with the motor. The simplest problem is .

Vestel washing machine - faults and do-it-yourself repairs

brush malfunction

It should be noted that brushes on collector motors wear out quite often. A specialist can easily replace them. Of course, it will be more difficult for a non-professional to cope with this task. However, this work is considered quite simple and can be done independently.

The situation is much more complicated if there is a current leak from the Bosch device motor to the body. Also, several turns of the winding of the motor may be broken. As a rule, in such cases, it is necessary to completely change the motor.The first difficulty you will encounter when performing this work is the inaccessibility of the tachometer and motor of the Bosch washing machine.

You can get to these elements of the washer as follows:

Disconnect the washing machine from the power supply;

Remove equipment to free space;

Remove the back wall of the Bosch machine body;

  1. Remove the drive belt;
  2. Take photographs of the location of fasteners and wires. This is necessary so that nothing gets mixed up during assembly;
  3. Remove the washing machine motor.
  4. Before removing the engine, you must first disconnect all the wiring chips from it. Next, you need to unscrew the bolts holding the motor and press on its body. It will move forward a little. Then you need to gently pull it down.
  5. Located on the motor housing

tachometer

. It is necessary to inspect the inner surface of the Hall sensor ring. If there are traces of grease and oxide, they should be removed. Then we check the tachometer with a multimeter. If it burns out, then replace it with a new one.

Motor malfunction

Models of Bosch washing machines assembled in Russia quite often experience serious problems with the motor. The simplest problem is

brush failure

It should be noted that brushes on commutator motors are often worn out. The technician can easily replace them. It will, of course, be more difficult for a non-professional to cope with this task. However, this work is considered quite simple and can be done independently.

The situation is much more complicated if current leaks from the motor of the Bosch device to the housing. Also, several turns of the winding may be broken in the motor. As a rule, in such cases it is necessary to completely change the engine.It will be cheaper than repairing an old motor. But first you need to check the current leakage.
2 comments
Recent Entries
Living outside the city: advantages and features of buying cottages in Kaliningrad
Selecting and installing inlet hoses: key points for long-term operation of the washing machine
To reset error F21, you must perform the following steps:

How not to overpay: Secrets of choosing a budget but high-quality washing machine First you need to turn the wash program selector to the “off” position.
Press the button that switches the drum speed and do not release it for several seconds. Then release the button.

What is whiteness used for and can it wash floors? Set the “drain” mode using the program switch.
When resetting the error, all the lights should blink simultaneously, and the washing machine should beep loudly. If after the last lowering of the button that is responsible for switching speed, nothing happened, then you need to perform the above steps again.

How to add salt to a Bosch dishwasher: practical tips Code F21 may appear on the display of a Bosch washing machine if a foreign object enters the tank. This happens quite often. Such an item can be a button, coin, pin, etc.
Metallic grinding and jamming of the drum during rotation indicates that a foreign object has entered the tank. It definitely needs to be pulled out.

Home It should be noted that washing equipment can issue code F21 not only when any element fails or a foreign object enters the tank. The error may appear when there is a strong voltage drop in the electrical network.
similar posts from this section