Why the faucet on the Bosch dishwasher flashes: full diagnosis

The situation when on the control panel of the dishwasher Bosch The crane symbol begins to flash or burn in red, familiar to many owners of this technique. This indicator is part of the self-diagnosis system and signals that the device cannot properly complete the wash cycle due to water problems. Unlike a simple shutdown, a flashing faucet is an attempt by smart electronics to inform the user of a specific failure that requires immediate attention. Ignoring this signal can lead not only to unwashed dishes, but also to more serious breakdowns, including leaks or failure of the heating element.

The first thing to do when an alarm is triggered is not to panic or try to force the program to restart. The Aquastop SystemThe nucleus, which controls the flow and removal of fluid, could have recorded a critical deviation from the norm. This can be a lack of pressure in the plumbing, clogging filters or even getting water into the pallet. Understanding the exact cause will avoid unnecessary costs for calling a master if the problem is of a household nature and is solved in five minutes.

In this article, we will discuss in detail all the possible reasons why the faucet indicator on dishwashers lights up or flashes. Bosch various series. We will consider the algorithms of actions for different modes of blinking, methods of self-diagnosis and cleaning of system nodes. You will also learn how to decrypt hidden error codes that are not always displayed explicitly on the display, but are stored in the controller’s memory.

⚠️ Warning: Before starting any diagnostic work, be sure to close the water supply tap and disconnect the device from the power grid. Working with electrical appliances and water pipes requires compliance with basic safety measures.

Decoding of crane indication modes

The behavior of the indicator may vary depending on the model of your dishwasher. Bosch and the nature of the malfunction. On display models InfoLight A digital scoreboard problem is often accompanied by an error code beginning with the letter E. However, on budget series, where a number of light bulbs are used instead of the display, the main source of information remains precisely the flashing of the faucet symbol.

If the indicator is constantly lit in red, it most often indicates that the machine can not draw water at a given time. Electronics awaits filling of the tank, but the level sensor does not record the flow of liquid. In this case, water-draw It's primary. The machine may hum trying to start the pump, but water does not enter the chamber. This is a classic situation for low pressure in a plumbing or an overlaid valve.

It is a completely different situation when the crane indicator starts to flash quickly. In most cases, this indicates a problem with the drainage of water or the operation of the leakage protection system. AquaStop. If the machine has already dialed in water, started washing, and then stopped with a flashing tap, it may be that the drain pump is not coping with the pumping or the drain hose is clogged. Also, a quick blink can mean that water has hit the pallet of the device, and the emergency float has triggered.

It is important to distinguish between these states, as the algorithm of actions will be radically different. For constant combustion, we check the incoming flow of water, and for blinking, the outgoing flow and integrity of the body. Incorrect diagnosis can lead to the fact that you will clean the filters when the problem lies in the electronic module or the supply hose.

Problems with water supply and incoming pressure

The most common, but common reason for stopping the cycle is the lack of water at the inlet. Dishwasher Bosch equipped with a duct sensor or a dial timer. If water does not enter the chamber in the allotted time (usually a few minutes), the controller stops the program and lights the emergency indicator. It protects. circulation-pump from work "dry", which could lead to its overheating and melting.

First, check if the water supply valve is open under the sink. It often happens that one of the household members blocks the water for other needs and forgets to return the tap to its original position. It is also worth checking whether the water is blocked in the whole apartment or house. If the water flows from the kitchen faucet weakly or does not go at all, the problem is global and not related to the dishwasher.

If there is water in the tap, but the dishwasher does not see it, attention should be switched to the filter mesh. It is located at the connection of the filler hose to the body of the machine or to the water pipe. Over time, rust, sand and small debris accumulate on it, completely blocking the fluid current. Even a small coating can lower pressure below the trigger threshold. electro-valve.

To clean the filter, it is necessary to block the water, unscrew the hose and carefully remove the mesh with pliers or tweezers. Wash it under a strong stream of water using an old toothbrush to remove solids. After installing the filter, check the connection back for leaks by turning on the water. Often, after this simple procedure, the machine will successfully resume operation.

Filter clogging and drain problems

When the faucet indicator flashes and there is dirty water inside the car, the problem lies in the drainage system. Dishwashers Bosch They are very sensitive to the quality of the filtration. At the bottom of the washing chamber there is a complex of filters: a flat mesh, a main cylindrical filter and a microfilter. If they are clogged with food residues, fat or bones, water cannot circulate normally and go into the sewer.

The system tries to pump out water, but due to resistance, it encounters difficulties. The level sensor detects that the water has not gone and blocks further actions, signaling to the user. In some models, when a strong blockage water may even start to overflow over the edge of the filtration system, which will also cause an emergency reaction.

Element of the system	Symptoms of pollution	Cleaning method	Frequency of service
Rough filter (grid)	Large rubbish in the tank	Flushing under the tap	Every day.
Main filter (cylinder)	Water doesn't go away, pump buzzes	Soaking in a detergent	Once a week.
Pump pump.	Full drain stop	Removal of foreign objects	If necessary,
Drain hose	Water stagnation in the hose	Blowing or flushing	Six months

Particular attention should be paid to the pump. Under the filter of rough cleaning, small objects often accumulate: toothpicks, seeds from fruits, fragments of glass. They can get into the impeller of the pump, blocking its rotation. To check this, you need to remove the filters and look into the drain hole. If foreign objects are visible, they must be carefully removed.

Check the drain hose as well. It shall not be clamped, twisted or curved at a sharp angle. If the hose is connected to the siphon of the sink, make sure that the connection place is not clogged. Sometimes a blockage forms in the siphon itself or the sewer pipe, and then the water from the dishwasher simply cannot pass further.

Clean filtering system – the key to the long life of your dishwasher Bosch. Regular maintenance prevents 90% of drain problems and associated errors.

Operation of the AquaStop protection system

One of the most serious causes of faucet blinking is activation of the system. AquaStop. It is a double hose with a thickening at the end, inside which is an electromagnetic valve. At the bottom of the hose, where it connects to the car, there is a plastic box with electronics. If a leak occurs in this hose or in the connections, water accumulates in a special tray (bath) inside the dishwasher body.

There's a float sensor in the pallet. When even a small amount of water hits, floats pop up and close the contacts. Electronics perceive this as a “flood” signal and immediately turn on the drain pump in emergency mode (it can work even when the car is turned off), and the faucet indicator lights up or flashes on the panel. This is a protective reaction to prevent flooding of the kitchen.

If you see this picture, there is a leak somewhere. It could be:

• 🔹 Cracks in the hose itself AquaStop Or a connection.
• 🔹 Depressurization of the door seal.
• 🔹 A blockage that caused a water spill over the edge of the chamber.
• 🔹 Microcracks in the tank or pipes inside the machine.

⚠️ Note: If AquaStop is triggered, don’t try to just reset the error and start the machine again. Until the cause of water entering the pallet is eliminated, the system will block the launch. Operating a car with a faulty AquaStop hose is dangerous.

For diagnosis, it is often necessary to remove the side wall of the body. You'll see water in the pallet. It should be wiped with a sponge or cloth. After drying the pallet floats will fall down, and the machine can work. However, this is a temporary measure. It is necessary to find and eliminate the source of the leak, otherwise the situation will repeat in the next cycle.

Diagnostics by error codes

Modern dishwashers Bosch They are able to display specific error codes that narrow the search for a malfunction. If you have a model with a display, pay attention to the combination of the letter E and the number. Even if there is no display, some flashing patterns (such as a beam on the floor or a combination of buttons) may indicate code.

The most common codes associated with the crane indicator are:

• 🔸 E09 Problem with water heating, but often accompanied by dialing errors.
• 🔸 E15 Activation of the leak protection system (water in the pallet). The most frequent code when flashing a faucet.
• 🔸 E18 Insufficient water pressure or clogging of the inlet filter. The machine cannot draw water in the allotted time.
• 🔸 E24 - The plum problem. Filter clogged, hose or faulty pump.

For models without a display, there is a diagnostic method through a combination of buttons. For example, in many models Bosch series Maxx or Classixx You need to simultaneously press two buttons (often the mode select button and the on button) for a few seconds. The car will go into service mode, where the flashing of light bulbs will indicate the error code. Blinking decoding can be found in technical documentation or service code tables for a particular series.

Accurate diagnosis by code saves time and money, allowing you to immediately order the necessary spare part or exclude unnecessary actions.

Resetting the error and restarting the system

After you have eliminated the cause of the malfunction (cleaned the filters, restored the water supply, removed the leak), you need to reset the error. Electronics Bosch remembers the state of the accident, and simply turning off/on doesn’t always help. There are several ways to reboot the controller.

The simplest method is “hard resetting”. Disconnect the dishwasher from the network (pull the plug out of the socket) or turn off the machine in the shield. Leave the device de-energized for 15-20 minutes. This will allow the capacitors on the control board to discharge, and the memory to be cleared of temporary errors. After turning on, try running a short program.

If a simple reset didn’t help, you can try a software reset through the control panel. On many models, you need to press the Start button for 3-5 seconds until the sound signal or the indicators go out. Some models require a combination: press the mode select button (for example, "Auto") and the power button at the same time for 3 seconds. After that, the machine can go into reset mode, which will take about a minute.

Algorithm of complete reset (universal):
1. Turn the car off with a button.
2. Shut off the power grid for 20 minutes.
3. Put it on the network.
4. Press the Start button 5-10 seconds before the signal.
5. Select a program and run it.

If after all the manipulations, the crane indicator lights up again a few minutes after the start, then the problem is not fixed or one of the sensors (pressostat, valve, pump) is defective. In this case, a deeper diagnosis with a multimeter is required.

Frequent Questions and Answers (FAQ)

Why is the Bosch dishwasher buzzing, but the water is not gaining, and the tap is burning?

The buzz indicates that valve It tries to open, or the pump tries to pump air. If there is no water, most likely the valve is blocked, the hose is bent or the inlet filter mesh is clogged. It is also possible that the electromagnetic water supply valve itself is defective and requires replacement.

Can I use a dishwasher if the faucet is flashing?

Using the vehicle in emergency mode is not recommended. If blinking is caused by a leak (code E15), further operation may result in short circuit or flooding of neighbors. If the problem is the drain, you risk spoiling a new portion of dishes with dirty water. Better get rid of the cause.

What if water is constantly in the car?

The constant presence of water in the pallet is a sign of an internal leak. Check the integrity of the pipes inside the housing, the condition of the door seal and clamps. If everything is visually intact, there may be a crack in the tank or pump itself. Requires disassembly of the car and defective knots.

How often should I clean the filters in the Bosch dishwasher?

It is advisable to rinse the rough filter after each wash cycle. The main filter and microfilter should be thoroughly washed with detergent at least once a week. This will prevent the appearance of odor, bacteria and drain errors.