Error F12 in the Bosch washing machine

It can be annoying to see the F12 error on your Bosch washing machine, particularly if you’re in the middle of a load of laundry. This error code denotes a problem that must be fixed before the machine can run again.

By knowing what the F12 error indicates and how to resolve it, you can avoid further harm to your washing machine and save time. The majority of the time, this problem stems from a communication issue within the machine’s system.

This post will walk you through the potential causes of the F12 error and provide you easy steps to take care of the issue by yourself.

The Bosch washing machine error code F12 denotes a malfunction in the water heating system, potentially stemming from a malfunctioning heating element, a damaged sensor, or a wiring issue. To fix it, make sure your washing machine is operating smoothly once more by checking these parts and replacing or repairing them as necessary. Message stream error

F12 in Russian

Simply consult the instructions to figure out what the error code F12 means. It takes only a quick glance to realize that the electric motor is having issues. You will need to perform a thorough examination because the self-diagnostic system won’t provide you with more precise information.

Let’s go over the potential range of malfunctions before removing the engine. Thus, the issues listed below result in F12:

• worn tips on the electric brushes;
• peeled off lamellas;
• broken winding.

Bosch typically displays "F12" as a result of worn electric brushes.

You must check each designated "point" in turn to determine who is responsible for the failure and what steps to take next. Since changing an electric brush at home is simple and can be done with your hands, it is best to start with one. If the F12 was caused by issues with the winding or lamellas, replacing the engine and calling a service center are your only options.

Motor check procedure

Either way, the "hidden" cause of F12’s appearance is the electric motor. As a result, the motor must be taken out of the washing machine’s body so that every component that is giving you trouble can be tested for functionality. The steps are as follows:

• disconnect the Bosch from the power grid and sewerage system;
• turn it with the "back" facing you;
• remove the back wall of the machine;
• find the engine located in the lower part of the housing;
• remove the drive belt from the pulley;
• loosen the central retaining bolt;
• swing the motor and pull it towards you, removing it from the seat.

Make sure the washing machine’s equipment is disconnected from the power supply before disassembling it!

It is worthwhile to learn a little bit about the engine’s construction before attempting to repair it. Keep in mind that Bosch machines use strong, small collector motors. Through the drive belt, the engine’s impulse is transferred to the drum shaft.

On to the "insides" now. A tachogenerator located on the motor housing regulates the motor’s rotational angle and sends speed information to the control board. Electric brushes that reduce friction force are located next to the sensor on both engine sides. The stator and rotor are two more essential parts.

Prior to anything else, the motor’s overall performance must be examined.

1. Establish contact between the stator and rotor windings.
2. Apply 220V to them;
3. evaluate the result (if rotation has started, then everything is fine).

Nonetheless, there are risks and challenges specific to this test. First of all, testing the motor’s performance in various modes is not feasible. Second, because the engine may overheat, applying voltage immediately raises the risk of a short circuit. Adding a heater to the circuit is advised to lower the risk of overheating. The heater will draw its primary power from the 220 V source. Has the motor passed the inspection? This indicates that spot diagnostics, which involves evaluating the state of the brushes, lamellas, and winding, is the next step.

Start with the brushes

Starting with the brushes is the better option. Sparks appear when the carbon tips wear off against the motor body over time, causing the friction force to not be smoothed out. All of this causes the engine to malfunction and display the error code F12.

It’s easy to verify the brushes’ integrity:

• find the brushes located on both sides – there are two of them;
• loosen the screws holding them;
• deal with the spring mechanism and remove the brushes;
• open each housing;
• measure the length of the "coals" (minimum – 1.5 cm).

Two electric brushes can be changed at once!

The malfunction has been identified if the carbon tip is worn out. In this instance, you will need to buy two identical brushes and swap out the old ones for them.

A Bosch washing machine’s Error F12 usually indicates problems with the water heating mechanism. Possible causes for this include a broken heating element, a broken temperature sensor, or electrical issues. The first step in fixing the error is to determine its root cause.

Many common problems, including Error F12, can be avoided by giving your washing machine regular maintenance and using it properly. It might be necessary to seek the advice of a qualified technician if basic troubleshooting fails to resolve the issue in order to prevent additional harm.

It will be easier to keep your Bosch washing machine operating smoothly and ensure that it is a dependable fixture in your home for many years to come if you know what Error F12 means and how to fix it.

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