Modern kitchen appliances Bosch is famous for its reliability, but even the most advanced systems are not immune to water supply failures. When the faucet symbol lights up on the display of your dishwasher, this does not always mean a critical breakdown that requires calling a technician. Often the problem lies in a simple lack of pressure in the pipes or clogged filters, which are easy to clean yourself.
However, ignore the signals indicator panel not possible, as they may indicate a water leak or failure of the inlet valve. In this article we will look at all possible options for displaying a tap, from flashing symbols to digital codes E-series. Understanding the exact meaning of the error will allow you to quickly eliminate the malfunction and return the equipment to service without extra costs.
First of all, you need to pay attention to the blinking pattern of the indicator. If the faucet is constantly on, this is one thing, but if it blinks at a certain frequency or is accompanied by a sound signal, this is a completely different diagnostic case. Electronic module The machine clearly differentiates between problems with water intake and problems with its drainage or leaks.
Interpretation of symbols on the display: flashing and static
The first thing you need to do when an error occurs is to carefully study the behavior of the indicator. A static tap symbol most often indicates that the machine is unable to draw water within the allotted time. This may be due to a closed valve, weak pressure in the central line, or a twisted inlet hose.
If the indicator blinks, the system reports more specific problems. On some models with AquaStop system Flashing may indicate that leakage protection has activated. It is important not to confuse these signals, since the methods for eliminating them are radically different. For accurate diagnosis, it is often necessary to run a test mode.
⚠️ Attention: If you see a flashing faucet and hear the hum of the pump, immediately turn off the water supply. This may indicate that the machine is trying to draw water, but due to lack of pressure or a blocked valve, the pump is overheating.
Many users are unaware that the number of flashes or their combination with other lights (such as salt or rinse aid) can indicate a specific error code, even if there is no digital display. On models without display LED indication is the only way to communicate between equipment and the owner.
To initially check the condition of the water supply system, you can use a simple survey that will help narrow down your search:
Code E09: Problems with heating and water supply
Code E09 often appears in the context of water problems, although technically it refers to the heating system. Dishwasher operating logic Bosch is this: if the water is not drawn to the required level or it is too cold due to a malfunction of the valve, the heating element cannot operate the cycle correctly, which provokes this error.
In this case, it is necessary to check not only the presence of water in the tap, but also its temperature. If you connect the machine to hot water (which is not always recommended for modern models with enzyme tablets), the temperature sensor may have detected an anomaly. It is also worth checking the contacts of the heating element.
Often the cause is a malfunction of the intake valve. If it does not open completely, the water drips too slowly, the machine waits to fill, the timer expires and an error is displayed. Replacing the valve is a simple procedure, but requires disassembling the lower part of the housing.
If you connect your dishwasher to hot water, make sure its temperature does not exceed 60°C, otherwise plastic parts and sensors may fail.
To resolve error E09, try resetting the program. If this does not help, you will need multimeter for continuity testing of the valve and heating element circuits. The resistance must be within the limits specified in the technical documentation for your specific model.
Code E15 and E16: Activation of the AquaStop protection system
The most alarming codes are E15 and E16. They mean that water has accumulated in the pan of the machine (in the lower part of the body, hidden from view). The level sensor in the pan (float) rose and closed the contacts, which led to an emergency drain and blocking the intake of new water. The faucet indicator lights up or flashes frequently.
The reasons for the appearance of water in the pan may be:
- 💧 Microcracks in pipes or hoses inside the housing.
- 🧼 Excessive foaming due to using regular detergent instead of dishwasher tablets.
- 🔧 Displacement or depressurization of the hatch cuff or pump seals.
- ❄️ Freezing of water in the hose (rare, but it happens if the hose runs along a cold wall).
To temporarily clear the error and drain the water from the pan, you can tilt the machine forward (after unplugging it!). The water will flow out onto the floor, the float will lower, and the machine can start working. However, this is only a temporary measure. Without finding and eliminating the cause of the leak, an error E15 will return on the next cycle.
⚠️ Attention: When tilting the dishwasher to drain water from the tray, be careful. Water can spill out not only from below, but also from residues in the tank. Place a cloth and make sure the power cord does not touch the puddle.
If after tilting the machine it started working, but after a couple of washes the error repeated, it means the leak continues. In this case, you will need to remove the side wall (usually the right one when viewed from the front) and visually inspect all connections for moisture.
Codes E24 and E25: Problems with the drain pump and filters
Although the codes E24 and E25 technically relate to the drainage system, they directly affect the ability to collect new water. The machine will not begin to draw clean water until the tank is empty of dirty water. If the drain pump is blocked or the filter is clogged, the cycle will stop and the water supply error will light up.
Code E24 usually indicates a clogged filter or a kinked drain hose. Code E25 more often indicates a malfunction of the drain pump itself or blockage of its impeller by a foreign object (bone, glass shard, lemon seed). In such cases drainage system doesn't cope.
Algorithm of actions for these errors:
- Take out the lower basket and get to the coarse filter.
- Unscrew the filter and rinse it thoroughly under running water.
- Look into the pump hole (where the impeller is) and check if it rotates freely.
- Check the drain hose corrugation for blockages.
A common mistake made by users is not installing the filter completely after cleaning. If you do not tighten it until it clicks, the security system will not allow the pump to start, and the machine will generate an error. Make sure that all elements fit into place tightly and without distortion.
☑️ Cleaning the filter system
Mechanical causes: hoses, valves and pressure
Before reaching inside the case with a screwdriver, it is worth eliminating external factors. Very often pinched hose or an accidentally closed valve under the sink becomes the cause of all the troubles. Check that the tap is fully open and that the hose behind the machine is not kinked.
Water supply pressure is another critical parameter. If you have a dishwasher Bosch with function AutoOpen or intensive cleaning, it requires a certain minimum pressure to open the valve. If the upstairs neighbors turned on the watering or shower, the pressure could drop and the machine would malfunction.
It's also worth checking the strainer on the water supply hose itself (where it screws onto the pipe). Over time, rust and sand accumulate there, blocking the flow of water. For cleaning:
- 🔧 Turn off the water supply valve.
- 🔌 Unscrew the hose from the water supply.
- 👀 Remove the small mesh with pliers.
- 🚿 Rinse it with a brush under strong pressure.
If the water supply hose has a system AquaStop (thickening at the end with a box), make sure that this box is not lying in a puddle of water and has not been flooded. A wet solenoid valve can short out, which will lead to an error or even trip the RCD in the panel.
Intake valve and electrical diagnostics
If external causes are excluded, there is water, the pressure is normal, but the tap error remains, most likely the inlet valve is faulty. This is an electromagnetic device that opens the way for water based on a signal from control unit. Over time, the valve coil may burn out, or it may become overgrown with scale and stop opening mechanically.
To check the valve you will need a multimeter. It is necessary to remove the top cover of the machine (usually two screws are unscrewed from the back, then the cover is moved back and removed). The valve is located at the hose connection point. You need to measure the resistance at its contacts.
Normal intake valve coil resistance is usually between 2 and 4 kilo ohms (kilo ohms). If the device shows one (open) or zero (short circuit), the valve must be replaced. Also check whether voltage is supplied to it when the program starts (observing safety precautions!).
| Code/Symbol | Probable Cause | Difficulty of repair | Necessary tool |
|---|---|---|---|
| Crane (static) | There is no water in the tap, the valve is closed | Low | No |
| Tap (flashing) | Leakage into the sump (AquaStop) | Average | Screwdriver, rags |
| E09 | Malfunction of heating element or valve | High | Multimeter |
| E24 / E25 | Clogged filter or drain | Low | Sponge, brush |
How to replace the intake valve yourself?
To replace the valve, turn off the water, unscrew the hose, and remove the top cover. Disconnect the wires (memorizing or photographing their position), unscrew the screw securing the valve to the body. Install the new valve in reverse order. Make sure the rubber gaskets are in place.
Prevention and proper operation
To ensure that water-related errors appear as rarely as possible, it is important to follow the operating rules. Do not use regular dishwashing gels; they create a lot of foam, which can flow into the sensors and cause false alarms. AquaStop.
Regularly, at least once a month, carry out preventative cleaning of filters and check the hoses for kinks. If you are going away for a long time, it is better to turn off the water supply valve to the dishwasher. This will save you from a potential flood in case of depressurization of connections while you are not at home.
Timely use of special products for cleaning dishwashers from grease and scale also extends the life of the inlet valves. Scale is the main enemy of the moving parts of the valve; it causes them to jam in the closed position.
Regularly cleaning filters and using only specialized detergents prevents 80% of water and drainage errors.
Frequently asked questions (FAQ)
Can I continue to use the dishwasher if the faucet error light is on?
No, operating the machine with an active water supply or leakage error (E15) is prohibited. This can lead to kitchen flooding, short circuit or failure of an expensive electronic module. First you need to eliminate the cause and reset the error.
How to reset a Bosch dishwasher error?
To reset the error, it is usually enough to turn off the machine with the button, and then disconnect it from the power supply for 10-15 minutes. After switching on, run a drain program or a short wash. If the error is caused by a temporary failure (for example, a pressure surge), it will disappear.
Why does my Bosch dishwasher hum but doesn't fill with water?
The hum may come from an intake valve that is trying to open but cannot due to lack of tension, a clog, or low pressure. The pump may also hum if it is trying to run dry or is blocked. Diagnostics of the valve and network pressure is required.
What should I do if there is always water in the pan after error E15?
The presence of water in the pan after draining (through the tilt) means that the leak continues. It is necessary to remove the side wall, dry all the components, run the machine with the wall open (being careful!) and observe where exactly the water is flowing from. Most often these are pipes or a cuff of the circulation pump.