The appearance of an indicator with a picture of a water tap on the control panel of the dishwasher Bosch - this is a signal that cannot be ignored. This symbol indicates that the system has problems with water intake or outflow. In most cases, the equipment goes into emergency mode, blocking the start of the program to prevent flooding of the room or failure of the heating element.
Modern models such as series Maxx or Silence Plus, are equipped with a sophisticated self-diagnosis system that instantly responds to deviations from the norm. If you see a burning or flashing faucet, this means that the controller has detected insufficient inlet pressure, an overflow of the pan, or an inability to drain the waste liquid. Timely response This signal will help you avoid costly repairs.
It is important to understand that there may be several reasons: from a banal bend in the hose to a serious malfunction of the electronic module. In some cases, the problem can be solved on your own in a few minutes, without calling a technician. However, chaotic actions without understanding the principle of operation of the device can aggravate the situation, so it is necessary to act consistently and carefully.
Explanation of indication and operating modes
The faucet indicator on the display or LED panel may behave differently depending on the specific fault. Static lighting of the symbol most often indicates problems with the water supply during the tank filling stage. The machine tries to gain the required volume, the timer expires, but the level sensor does not detect the flow of liquid. In this case, the cycle is interrupted and a warning is illuminated.
If the icon flashing or lights up in conjunction with another symbol (such as a blob or star), this may indicate a problem with the drain. The system has detected that water is not leaving the cooking chamber after the rinse cycle has completed. There is also a mode where the indicator lights up when a leak is detected in the pan, activating the system AquaStop. In this case, the pump may run continuously, trying to pump water out of the protective tray.
Various models Bosch may use color coding to clarify the diagnosis. For example, a red indicator requires immediate attention, while a yellow one may indicate a warning that can be resolved at the earliest opportunity. Understanding these nuances helps to quickly localize the source of the problem.
Problems with water supply and inlet filter
The most common reason for the faucet icon to light up is the lack of normal pressure in the water supply network. Before disassembling the machine, make sure the inlet water valve is fully open. Sometimes house services carry out preventive work, and the water may be temporarily shut off in the entire riser. Check the pressure by opening the kitchen faucet.
The second important element is input filterlocated at the point where the inlet hose connects to the machine body. Tap water often contains sand, rust and other solids that can clog the screen over time. This causes the water to flow too slowly and the machine to generate a fill timeout error. To clean, you need to turn off the water, unscrew the hose and carefully remove the mesh with pliers.
⚠️ Caution: Before disconnecting any hoses, be sure to turn off the water supply valve and unplug the dishwasher to avoid short circuits.
It is also worth inspecting the inlet hose itself. It should not be twisted, crushed by heavy furniture or have creases. The inner diameter of the hose must be free for flow. If the hose is old and has visible defects or scale deposits inside, it is better to replace it with a new one that is certified for dishwashers.
☑️ Checking the water supply system
Malfunctions of the drainage system and drainage pump
If the machine has filled with water, washed, but cannot drain it, the faucet icon will also light up, signaling a critical situation. First of all you need to check drain hose. Make sure that it is not kinked or crushed and that the end of the hose connected to the sewer is not immersed deep in water, which can create a siphon effect and prevent the free flow of liquid.
A clog in the filter flask is the second most common cause of drainage problems. Leftover food, fruit pits or olive pits can block the pump impeller. To fix this, you need to open the door, remove the lower basket and dismantle the filtration system in the bottom of the sink. Rinse all elements thoroughly under running water using a brush.
The table below shows the main symptoms and likely locations of the blockage:
| Symptom | Probable Cause | Check location |
|---|---|---|
| Water stands at the bottom | Filter clogged | Washing chamber bottom |
| The pump is humming | Foreign body entry | Pump impeller |
| No flush sound | Pump fault | Electric circuit |
| Gurgling in the sink | Sewer blockage | Siphon under the sink |
If after cleaning the filter the water still does not come out, the filter itself may have failed. drain pump. Check that the impeller rotates freely and that there are no threads or hair wound on it. Mechanical blockage often causes the pump motor winding to burn out.
How to test a pump with a multimeter?
To check the pump, you need to ring its winding with a multimeter in resistance measurement mode. Normal readings are between 150 and 200 ohms. If the device shows one (open) or zero (short circuit), the pump must be replaced.
AquaStop leak protection system
Dishwashers Bosch equipped with a reliable leakage protection system known as AquaStop. A float sensor is installed in the lower part of the housing (pan). If water (even a little) gets into the pan, the float floats up and closes the contacts, which leads to activation of the emergency mode. At this moment, the faucet icon lights up, and the pump can operate continuously, pumping out water.
There may be several reasons for water getting into the pan. This could be a microcrack in the tank, leaking hose connections inside the housing, or a simple overflow due to the use of an unsuitable detergent (for example, hand washing gel, which produces a lot of foam). Foam overflows the chamber and flows over the edge into the technical compartment.
To reset an error caused by a trigger AquaStop, often it is not enough to simply turn off the machine. It is necessary to tilt the machine body forward (by placing a rag, as water will pour out of the pan) so that the water flows out and the float drops to its original position. After this, the machine can be turned on and checked for leaks.
Use only specialized dishwasher tablets or powder. Hand wash gels create excess foam, which causes false alarms on leakage sensors.
Technical faults and electronics
If mechanical causes are ruled out, the problem may lie in electronic components. Solenoid valve The water supply may fail and not open upon command from the control module. In this case, water does not physically enter the machine, although voltage is supplied to the valve. The check is carried out by checking the valve coil.
The water level sensor (pressure switch) may also give incorrect readings. If it is “stuck” or its tube is clogged, the control module will “think” that the tank is full, although it is empty, or vice versa. On electronically controlled models, the diagnostic error code may be displayed by a combination of flashing lights. For example, on some models Bosch Serie 4 or 6 the combination of flashes corresponds to a specific code that can be deciphered in the instructions.
⚠️ Attention: Repairing electronic components and replacing sensors requires skills in working with electrical equipment. Do not take measurements when the device is plugged in.
In rare cases, the control module itself becomes the culprit. Power surges in the network can damage traces or elements of the board, causing it to stop correctly processing signals from sensors. In such a situation, professional diagnostics and, possibly, flashing or replacement of the board are required.
Algorithm of actions when an error occurs
To effectively troubleshoot a problem, it is recommended to adhere to a clear algorithm. You should not try to restart the program many times in a row, this may lead to flooding. First, conduct a visual inspection of external elements: hoses, taps, filter in the sink.
Then move on to an internal audit: clean the filters, check the sprinklers for blockages. If simple methods do not help, you will need to partially disassemble the machine to access the internal hoses and sensors. Remember that any disassembly must be carried out with the device completely de-energized.
If you are not confident in your abilities or the diagnostics indicate a complex breakdown (module malfunction, replacing a pump in a hard-to-reach place), it is better to contact an authorized service center. Professional repairs guarantee the use of original spare parts Bosch and maintaining the warranty.
90% of cases where the faucet icon appears are resolved by cleaning the filters or checking the water pressure, without requiring a call to the technician.
Frequently asked questions (FAQ)
Why does the tap icon light up even though there is water in the car?
This means that the water level sensor did not detect the required pressure or volume, or the leakage protection system has activated AquaStop. The machine “sees” the water, but cannot confirm that the level is correct to start heating.
Is it possible to use the machine if the faucet is blinking?
Operate the equipment in this mode absolutely not recommended. This can lead to flooding of the kitchen or burning out of the heating element if it turns on without water. The cause of the error must be eliminated.
How to reset a tap error on a Bosch dishwasher?
Usually it is enough to eliminate the cause (clean the filter, open the tap) and restart the program. If it worked AquaStop, you may need to tilt the machine to remove water from the pan and turn it on again after 10-15 minutes.
What does error code E09 or faucet and drip flashing mean?
The coding may vary between models, but often this indicates a problem with the heating or flow sensor. Exact decoding for your model Bosch can be found in the technical documentation by entering the E-number of the device.