The situation when the control panel of your dishwasher Bosch The faucet indicator starts flashing, always causing an alarm. This symbol indicates problems with the water supply or drainage, and ignoring the signal can lead to more serious consequences, including flooding the kitchen. Modern models such as Series 4 or Series 6, are equipped with a smart diagnostic system that adjusts the flashing to a specific rhythm or combines it with other indicators to accurately indicate a malfunction.
Before calling a technician, you should carry out an initial diagnosis yourself, since often the reason lies in a simple clogged filter or a kinked hose. AquaStop system, installed in most units of this brand, can block the start of the program at the slightest suspicion of a leak, even if there is no water on the floor yet. Understanding the operating logic of electronic modules will help you save time and money by fixing simple problems yourself.
In this article we will analyze in detail all the possible reasons for the appearance of this symbol, from problems with pressure in the water supply to the failure of expensive sensors. You will learn how to decipher hidden error codes that are not directly displayed on the display, and what actions should be taken first. A critical point is the correct sequence of actions when resetting an error so as not to damage the electronic control module.
Decoding signals: what does a flashing tap mean?
Tap indicator on the dishwasher display Bosch is a universal signal that can indicate various stages of water supply disruption. Unlike washing machines, where the error code is often displayed in numbers, this uses a combination of flashes or lights together with other symbols, such as a droplet or salt. Flow sensor (aqua) monitors the rate of water inflow, and if it is below a minimum threshold, the control module interrupts the cycle.
Users often confuse the blinking of the faucet with an indication that the pan is full, but these are different protection systems. If the faucet flashes constantly or at regular intervals while drawing water, the problem lies in the intake tract. If the symbol lights up at the end of the cycle or during draining, this means that it is impossible to pump out the used liquid from the working chamber.
It is important to distinguish between a static indicator light and its blinking. A static symbol often indicates that the machine is simply not running or that a program has been selected without a preliminary rinse phase. Blinking always indicates dynamic error, which arose in real time during program execution.
Remember the blinking rhythm: on some Bosch models, the number of flashes corresponds to the last digit of the error code (for example, 9 flashes - error E09).
Water supply problems: pressure and hoses
The most common reason why a red faucet lights up is insufficient pressure in the water supply. Dishwashers Bosch require a minimum pressure of 0.05 MPa (0.5 bar) for correct opening intake valve. If your home has low pressure or neighbors use water at the same time, the machine may simply not have time to draw the required volume in the allotted time.
The second important aspect is the condition of the inlet hose and mesh filter. Even a small pebble or rust from pipes can clog the valve inlet. In systems with protection AquaStop, the hose has a thickening at the base where the safety solenoid valve is located. If this unit fails or there is no voltage supplied to it, water will not physically enter the machine.
- 🚰 Check whether the water supply valve on the pipe under the sink is fully open.
- 🔍 Inspect the inlet hose for kinks, especially in the bends near the wall.
- 🧹 Rinse the mesh filter at the entrance to the car under strong water pressure.
- 📉 Make sure that the pressure in the water supply has not dropped due to utility work.
Sometimes the problem lies in the solenoid valve. Over time, its coil may burn out or silt up, which will prevent the mechanism from opening. You can check this by applying voltage to it directly (observing safety precautions), but this requires skills in working with a multimeter.
Drainage errors and drainage system
If the faucet light comes on after the wash has finished or during a pause, this often indicates a problem with the drain. The machine cannot pump out dirty water, and the liquid level sensor (pressostat) detects its presence in the tank. In this case drain pump may be blocked by a foreign object or the electrical part of the motor may fail.
A clogged sink drain is a classic cause that many homeowners forget about. If the dishwasher drain hose is connected to a common riser through a siphon, and it is clogged with food waste, the water simply has nowhere to go. The pressure in the hose increases, and the flow sensor or pressure switch signals an error by lighting the corresponding indicator.
⚠️ Attention: Before checking the drain pump, be sure to unplug the dishwasher from the electrical outlet and turn off the water. Rotation of the pump impeller with your fingers should be free, without jamming.
It is also worth checking the corrugated drain hose for the formation of “water plugs” or kinks. If the hose lies in loops on the floor, water can stagnate at low points, creating back pressure. The correct height of the drain hose (usually 60-80 cm) is critical for gravity flow and pump operation.
AquaStop leak protection system
Technology AquaStop - This is double protection, including a mechanical valve at the base of the hose and a tray with a float inside the machine. If water accumulates in the pan (bottom of the housing), a foam float floats up, which mechanically or electrically activates the emergency drain and blocks the intake of new water. In this mode, the tap on the display may flash, indicating that protection is activated.
The reason for water getting into the pan can be not only leaking hoses, but also simple foaming. Using regular detergents instead of dishwasher tablets causes a lot of foam that overflows the chamber and ends up on the bottom of the cabinet. The sensor detects water in the pan and triggers an error.
To reset an error AquaStop Often it is not enough to simply eliminate the cause. You need to unplug the machine, wait 10-15 minutes, and then run the drain program or short wash. If there is any water left in the pan, the machine will go into emergency mode again.
How to check the AquaStop float without disassembling the machine?
Tilt the machine, which is turned off and unplugged, forward (towards you) 45 degrees. If a glass of water flows out from under the bottom and you hear a click, it means that the leakage protection has activated.
Diagnostics by error codes (E-codes)
Although only the tap lights up on the display, a specific error code is stored inside the electronic module. On some models Bosch with a display you can see the code (for example, E09, E15), but on models without a display (with dots), the code is transmitted by the number of flashes of the “Salt” or “Rinse Aid” indicator when turned on in a special mode.
Below is a table of common water supply errors that can cause a faucet to flicker:
| Error code | Description of the problem | Probable Cause |
|---|---|---|
| E09 | Water heating | Malfunction of the heating element or temperature sensor (the machine does not heat the water, thinking that there is none) |
| E15 | Leakage into the sump | The AquaStop system has activated, there is water at the base of the housing |
| E24 | Drain problem | Clogged filter, hose or drain pump malfunction |
| E01 | No water supply | The tap is closed, there is no pressure, the inlet valve is faulty |
For accurate diagnostics on models without a display, the service mode is used. Usually you need to hold down the power button and the program selection button (often "VarioSpeed" or "S") at the same time for a few seconds. The machine will go into testing mode, where the indicators will light up sequentially, indicating that the components are working properly.
Code E15 is the most critical - it means real water inside the housing. Operation of the machine with this error is prohibited until the tray is completely dry.
Troubleshooting instructions
If your dishwasher Bosch The tap is flashing, follow the following algorithm. First, rule out external factors, then move on to internal diagnostics. Do not attempt to disassemble complex components such as a heat exchanger or electronic module without appropriate experience.
☑️ Algorithm of actions in case of faucet error
Start by cleaning the filters. Unscrew the bottom filter in the chamber and wash it with warm water and a degreaser. Often, a greasy film clogs the cells and water cannot pass through, which the sensor interprets as a lack of drainage or overflow. Also check the drain pump impeller - it is located under the filter and may be blocked by a bone or glass.
If simple methods do not help, you may need to replace components. Flow sensor (AquaSensor) is a sensitive element that becomes dirty over time. Cleaning it with special products or replacing it can restore normal operation. In case of failure intake valve, replacing it is the only solution.
⚠️ Attention: If after all the procedures the machine continues to show an error and you hear the hum of the pump without drawing water, immediately stop trying to start it. Running the pump dry can cause it to burn out.
Frequently asked questions (FAQ)
Why does the tap blink if there is water in the tap?
The presence of water in the water supply does not guarantee sufficient pressure. The dishwasher may not open the valve if the pressure is below 0.05 bar. The reason may also be a clogged inlet filter or a malfunction of the valve itself, which does not receive a signal from the control module.
What to do if the faucet and the droplet are on at the same time?
This combination usually indicates a problem with brine or water hardness, but in the context of water supply errors it can signal water mixing in the heat exchanger or a leak. Check the salt level and the seal of the salt container lid.
How to reset error E15 on a Bosch dishwasher?
To reset error E15 (leakage), you must unplug the machine, eliminate the cause of water getting into the pan and let the machine dry. In some models, holding the "Start" button for 3-5 seconds helps, but physically removing water from the pan is necessary.
Is it possible to use the machine if the faucet is blinking?
Operation is not recommended. If the error is related to overflow or leakage (AquaStop), further work may lead to flooding of the kitchen and damage to the flooring. Use the machine only after the cause has been eliminated and the error has been reset.