The situation when a brush-shaped indicator lights up or flashes on the control panel of a Bosch dishwasher often confuses users. This symbol is not a universal error code for all models, but in most cases it indicates specific operating conditions or the need for maintenance. Understanding the context in which this sign appeared allows you to quickly return the equipment to working condition without calling a technician.
In modern models Bosch Serie 4 and Serie 6 a combination of lights may indicate the activation of the pre-rinse function, which is often used to accumulate dishes before a full load. However, if it is the individual brush icon or a combination that resembles cleaning that is lit, this may indicate that the filters are clogged or a service procedure is needed. It is important to take a close look at whether the indicator is flashing or constantly on, as this changes the algorithm of actions.
In this guide, we will look at the main scenarios in which this indicator is activated. You will learn how to fix the problem yourself if it is related to the settings, and when you should pay attention to the technical condition drain system or filters. Correct diagnosis will save time and prevent equipment breakdowns in the future.
Mode for rinsing and accumulating dishes
The most common reason for the symbol that looks like a brush or drops with rays to light up is the pre-rinse function is activated. In the lines Bosch Silence Plus and ActiveWater This mode allows you to put dirty dishes in the basket during the day without running a full wash cycle. The machine automatically rinses incoming dirt so that it does not dry out until the main wash.
If the indicator lights up constantly, this means that the mode is turned on and the machine is ready to receive dishes. To disable this function, you must hold down the program selection button or the special "VarioSpeed Plus" key (depending on the model) for 3-5 seconds until the corresponding sound signal appears. Sometimes users accidentally activate this mode while trying to simply turn on the machine.
It is worth noting that in some modifications the brush symbol can be combined with other indicators, indicating the need to add salt or rinse aid. Check the display carefully: if only one segment is flashing, the problem is local. If the entire row of indicators blinks, we may be talking about a more complex electronic malfunction.
⚠️ Attention: Prolonged use of the pre-rinse mode without running a full wash results in excessive consumption of water and electricity. Use this function only when you need to accumulate dishes for 1-2 days.
To reset the settings and return to the standard cycle, simply select the desired wash program and press the "Start" button. The machine will automatically go into waiting mode for the main cycle to start, ignoring the previous accumulation settings.
Indication of the need to clean filters
The second important scenario in which the care symbol (often depicted as a brush or mesh) lights up is to indicate that the filtration system is dirty. Dishwashers Bosch equipped with sensors that indirectly monitor the passage of water through coarse filter. If the water is circulating slowly, the system may indicate a need for maintenance.
A clogged filter is one of the main reasons for poor cleaning and the appearance of an unpleasant odor. Over time, food residues, grease and scale form a dense layer that blocks the flow of water. The indicator lights up to remind the user to perform routine maintenance. Ignoring this signal may result in failure circulation pump.
The cleaning procedure is simple and does not require special tools. It is necessary to remove the lower basket, unscrew the cylindrical filter and flat mesh, and then wash them thoroughly under running water using a mild detergent. It is also a good idea to check the area around the pump impeller for any large bones or glass.
☑️ Cleaning the dishwasher filter
Once clean components are installed, the light should go out after the next successful wash cycle. If the symbol continues to light, contamination may have occurred in the drain hose or siphon, where fine debris could have entered.
Electronics failure and need to reset
Sometimes the brush light that comes on is not related to the physical condition of the machine, but is the result of a software failure in the controller. Electronics Bosch sensitive to power surges in the network, which can lead to freezing of the logic of the control panel. In such cases, the machine “thinks” that an error is on, although in fact all systems are working.
To eliminate false readings, you must perform a full reset (Hard Reset). This action will return the machine parameters to factory values and clear the temporary memory of the controller from erroneous data. The procedure is safe for equipment and is recommended by manufacturers for any oddities in the display behavior.
Follow these steps to reset:
- 🔌 Disconnect the dishwasher from the power supply by removing the plug from the outlet.
- ⏳ Leave the car de-energized for 15-20 minutes to completely discharge the capacitors.
- 💡 Turn on the power and run the test program without cookware.
If the brush light remains on or flashes in combination with other symbols after a reboot, this may indicate a deeper problem in the control module. In rare cases, flashing or replacing the board is required, but first you should rule out simple causes.
Secret button combination
On some Bosch models, errors are reset by simultaneously pressing the "Start" button and the program selection button (usually with a drop or brush icon) for 3-5 seconds. The screen may blink to confirm the reset.
Diagnostics by flashing indicators
Dishwashers Bosch Often they use a system of error coding through blinking indicators. If the brush is on, pay attention to the accompanying signals. For example, the brush symbol and salt icon flashing at the same time may indicate a problem with the water hardness sensor or softener regeneration.
Below is a table of combinations related to the maintenance and cleaning indication:
| Indicators | Status | Probable Cause | Action |
|---|---|---|---|
| Brush (permanent) | Lit | Rinse mode | Select washing program |
| Brush + Drop | Flashing | Lack of rinse aid | Add product |
| Brush + Salt | Flashing | Hardness sensor failure | Check settings H |
| Brush (flashing) | Flashing | Filter clogged | Clear system |
It is important to distinguish between the colors of the indicators. On models with display InfoLight or LED string color may change. Red usually requires immediate attention, while yellow or orange are advisory.
If the blinking is rhythmic, try counting the number of flashes. Some service codes are transmitted precisely by the number of blinks before the pause. This will help you more accurately identify the node that requires attention.
Problems with water supply and pressure
The brush symbol may indirectly indicate hydraulic problems. If the water pressure in the system is insufficient, the machine cannot effectively wash away contaminants, and the sensors detect an anomaly. Some algorithms interpret this as a need to “clean” or maintain the water intake system.
Check the inlet mesh filter located where the inlet hose connects to the machine. Fine rusty sand or scale from old pipes can clog this mesh in a matter of months. Cleaning the mesh often solves the low pressure problem and eliminates erroneous indications.
It is also worth checking the hose for kinks. If the machine is built into a kitchen unit, communications could be crushed during installation. Normal pressure critical for turbine operation and activation of all washing modes.
⚠️ Attention: Before unscrewing the inlet hose, be sure to turn off the water supply tap. A sudden increase in pressure in the water supply system can lead to flooding of the kitchen.
After cleaning the screen and checking the hose, run a short wash cycle. If the brush indicator goes out, then the problem was precisely the hydraulic resistance.
Use a magnetic filter at the water inlet of the dishwasher. This simple device traps metal shavings and rust, protecting not only the filter screen, but also the internal components of the machine from abrasive wear.
When you need to call a technician
There are situations when independent actions do not help, and a burning brush indicator indicates a serious malfunction. If after cleaning the filters, resetting the settings and checking the water, the symbol continues to light up, one of the sensors or actuators has probably failed.
Most often replacement is required water turbidity sensor (aqua sensor). This element analyzes the clarity of the water after each rinse. If it is dirty internally or is faulty electronically, it sends an incorrect signal to the control board, which in turn lights up the service indicator.
Another possible reason is a malfunction flow heater or heating element. If the water does not heat up to the set temperature, fats do not dissolve, and the system detects ineffective washing, giving a signal about the need for maintenance. Diagnosis of these components requires disassembling the machine and using a multimeter.
You need to contact the service center if:
- 🛠️ The machine makes strange sounds (humming, knocking) when operating.
- 💧 There is a water leak under the hull.
- 🔥 You can smell burning or burning plastic.
- 🚫 Resetting errors does not work more than twice.
Professional diagnostics will allow you to accurately determine the error code hidden in the controller’s memory and replace the defective part. Attempts to repair complex electronics without experience can lead to permanent failure of the machine.
A burning brush indicator in 80% of cases is solved by cleaning the filters or resetting the settings. Only in other cases does it require replacement of parts.
Prevention and proper care
To ensure that the brush indicator and other alarms disturb you as little as possible, it is important to follow the operating instructions for your dishwasher Bosch. Regular maintenance extends the life of the equipment and ensures that the dishes are perfectly clean.
Once a month, it is recommended to run a self-cleaning cycle of the machine at a temperature of 70°C using a special dishwasher cleaner. This helps dissolve fat deposits in hard-to-reach areas and deodorize the system.
Don't forget to replenish your supplies on time special salt and rinse aid. The use of ordinary table salt is strictly prohibited, as it causes corrosion of the tank and ion exchanger, which leads to expensive repairs.
Keep the rubber seals on the door clean. Plaque and grease that accumulate there can cause loose seals and leaks, which can also activate various safety indicators on the panel.
Frequently asked questions (FAQ)
What should I do if the brush light flashes along with the drop?
This combination most often indicates a low rinse aid level. Open the dispenser and add the special product. If the light does not go off immediately, it will disappear after the next wash cycle is completed.
Can I use the dishwasher if the brush is on fire?
If this is the rinsing mode, you can. If the indicator indicates an error or blockage, operation is possible, but the cleaning quality will be low, and the risk of pump failure increases. It is better to eliminate the cause before the next boot.
How can you tell if the turbidity sensor is burnt out?
An accurate diagnosis can only be made with a multimeter. However, an indirect sign may be that the machine endlessly rinses the dishes or, conversely, completes the wash in 5 minutes, considering the water clean. In both cases, the service indicator lights up.
Why does the indicator not go off after cleaning the filter?
The system needs time to update the data. Run a full wash cycle (for example, "Auto 45-65"). Only after the program has been successfully completed and clean water has been collected, the sensors will update the status and the indicator will go off.
Where is the error reset button on Bosch?
There is usually no separate "Reset" button on the panel. Reset is performed either by long-holding the "Start" button (3-5 seconds), or by a combination of buttons (depending on the model), or by completely turning off the power for 15 minutes.