A sudden stop in the operation of household appliances is always irritating, especially when an alarm symbol lights up on the control panel. If your dishwasher Bosch The faucet indicator lights up, this indicates problems with the water supply or its collection into the system. The device blocks the start of the program to prevent the pump from running dry or the kitchen from flooding.
There is no need to panic in such a situation. In most cases malfunction It is removable and does not require calling a specialist. Often the reason lies in a simple lack of pressure in the water supply or a kink in the hose, which is easy to check yourself. However, sometimes a lit icon indicates more serious damage to internal components.
In this article we will analyze in detail all the possible reasons for activating emergency mode. You will learn how to correctly diagnose the problem, which components to check first, and when specialist intervention is really necessary. A competent approach will help save time and budget on repairs.
Decoding signals: what does a burning faucet mean?
Indicator showing a water tap on the display or panel Bosch - this is a universal signal of the self-diagnosis system. It reports that the machine was unable to draw the required amount of water within the allotted time or did not detect any liquid flow at all. Electronics detects the lack of water movement and interrupts the washing cycle.
It is important to distinguish between the blinking modes of the indicator. If the tap is constantly on, this most often indicates a lack of water supply from the outside. If the symbol flashes or is accompanied by other error codes, the problem may lie in a leak in the system or malfunction of the sensors. Understanding this difference is the first step to a successful renovation.
⚠️ Attention: Don't ignore repeated water intake errors. Repeated attempts to start the machine without water can lead to burnout of the heating element (heating element) or failure of the circulation pump.
Modern models Bosch series Logixx or Silence Plus equipped with an advanced protection system AquaStop. If the faucet lights up, it is possible that this particular leakage protection mechanism has worked, even if there is visually no water on the floor. The sensor in the pan may have detected minimal moisture, which also blocks the operation of the device.
External factors: checking the water supply
Before disassembling the car or looking for complex breakdowns, it is necessary to exclude external factors. The most common reason is the lack of water in the tap. Check to see if the cold water valve under the sink is open. Sometimes household members close it by accident or forget to open it back after replacing the filters.
The second important aspect is the condition of the inlet hose. It should not be twisted, crushed by furniture or have creases. Even slight squeezing of the flexible tube significantly reduces the pressure, and the machine perceives this as a lack of water. Extend the hose along its entire length.
- 🚰 Make sure the water supply valve is fully open (the handle should be parallel to the hose).
- 💧 Check the pressure in the tap: if the water flows barely, the problem is in the plumbing of the house, not in the car.
- 🔌 Inspect the hose for kinks and mechanical damage along its entire length.
It is also worth checking the filter mesh installed at the inlet of the fill valve. Over time, it becomes clogged with rust, sand and scale from the pipes, especially after the water in the area is turned off. This creates an “air lock” effect, preventing liquid from passing inside.
Internal filters and fill valve
If external checks do not produce results, we move on to internal diagnostics. A common reason that the dishwasher Bosch does not take in water, the inlet valve is dirty. This electromagnetic unit controls the water supply, and if its mesh is clogged, the valve simply does not open or allows too little liquid to pass through.
To clean, you need to turn off the water, unscrew the inlet hose from the machine body and carefully remove the small mesh with pliers. Rinse it under a strong stream of water, you can use an old toothbrush. Often it is this simple step that brings the equipment back to life.
If the mesh is clean, but water still does not flow, it may have failed itself. fill valve. It could have burned out due to a power surge or mechanical jam. You can check its performance with a multimeter by measuring the winding resistance. Normal values vary in the range of 2-4 kOhm.
☑️ Cleaning the intake valve
Another hidden problem is clogged internal pipes and sprinkler nozzles. If water flows, but under low pressure, inspect the rocker arms. Unscrew them and check the holes for lemon seeds, food debris or scale. Thorough flushing will restore normal circulation.
AquaStop system and leak protection
Technique Bosch famous for its reliable leakage protection system AquaStop. It consists of a double hose and a tray with a float at the bottom of the machine. If water appears in the pan, the float floats up and mechanically or electrically shuts off the water supply, and the tap lights up on the display.
Sometimes the system triggers falsely. This may happen due to condensation forming inside the cabinet, or because the machine was parked on an uneven floor and the water in the pan moved towards the sensor. In such cases, it is necessary to disassemble the lower part of the housing to dry the tray.
| Symptom | Probable Cause | Action |
|---|---|---|
| The tap is on, the pan is dry | Clogged filter or valve | Cleaning the mesh, checking the hose |
| The tap is on, there is water in the pan | AquaStop triggered | Finding leaks, drying pan |
| The machine hums, but does not dial | Pump fault | Pump diagnostics |
| The indicator flashes | Electronics failure | Reboot or repair the board |
If you find water in the pan, be sure to find the source of its appearance. This could be a crack in the pipe, a leaky hose connection, or a broken hatch cuff. Eliminating the cause of the leak is more important than simply removing the water.
Diagnostics of pumps: circulation and drainage
If the water supply is normal, the filters are clean, and the protection system is not active, the problem may lie in the pumps. A circulation pump circulates water through the system. If its impeller is blocked by a foreign object (glass, bone), the motor hums, but does not pump water, and the flow sensor records the error.
The drainage pump is responsible for pumping out dirty water. If it does not work or its filter is clogged, the machine will not be able to drain the remaining water from the previous cycle and, therefore, will not draw fresh water. Check the drain filter at the bottom of the sink chamber - it often becomes clogged with grease and food debris.
How to check the pump without disassembling?
Turn on the "Drain" or "Rinse" mode. If you hear the hum of the pump, but the water does not flow out, the drain hose or sewer is probably clogged. If there is silence, the pump motor has burned out or there is no power.
To check the circulation pump, partial disassembly of the machine is sometimes required. You can get to it through the lower compartment (after placing the car on its side). The rotation of the impeller should be free, without jamming or extraneous noise.
⚠️ Attention: When checking pumps, be sure to turn off the power to the device! Working with electrical components in a damp environment can be fatal. Do not touch wet parts while the cord is plugged in.
Electronics: flow sensor and control module
When all the mechanical parts are working properly, the electronics come into play. The key element here is the water flow sensor (aquasensor). It measures the amount of fluid passing through. If the sensor is dirty or faulty, it sends an incorrect signal to control module, which turns on the faucet indicator.
The control module (board) itself may also be the cause of the failure. Voltage surges, moisture or manufacturing defects lead to failure of the triacs that control the valve or the logic chip. In this case, the machine may behave chaotically: it either takes in water or stops.
- 🔌 Check the integrity of the wires going to the flow sensor and valve.
- 🧪 Check the contacts of the flow sensor with a multimeter for breaks.
- 💻 Inspect the control board for blackening, swollen capacitors or burnt marks.
Repairing electronics requires special knowledge and equipment. If you do not have the skills to work with a soldering iron and electrical circuits, it is better not to take risks. An attempt to repair the board yourself may lead to permanent failure of the machine.
Before calling the wizard, try performing a complete program reset. Press the "Start" button (or the combination of buttons specified in the instructions for your model) for 3-5 seconds until a sound signal appears. This often helps clear the controller error.
Table of error codes and their meaning
For more accurate diagnostics, it is useful to know the error codes, which can be displayed on the display in the form of numbers or combinations of symbols along with a burning tap. Below is a table of the main codes for dishwashers Boschrelated to water supply.
| Error code | Description of the problem | Recommended Solution |
|---|---|---|
| E09 / E19 | Heating problem (often when there is no water) | Check the heating element and the presence of water |
| E15 | Activation of AquaStop (water in sump) | Fix the leak, dry the pan |
| E24 | Clogged drain hose or filter | Clean the drain system |
| E29 | Intake valve malfunction | Replacing the water supply valve |
Please note that codes may vary depending on the series and year of your model. Bosch. The exact decoding can always be found in technical documentation or on specialized forums for repairing household appliances.
When you need to call a specialist
Despite the desire to fix everything yourself, there are situations when professional help is inevitable. If you have checked all external factors, cleaned the filters, made sure there is water and pressure, but the faucet indicator continues to light, the problem is inside the housing.
Complex cases require replacement of spare parts: pumps, valves, sensors or control module. This requires original components and tools. In addition, the technician will be able to conduct in-depth diagnostics of electronics, which cannot be done at home.
If the problem persists after cleaning the filters and checking the hoses, further disassembly on your own may void the warranty and make repairs more difficult.
It is also worth contacting a specialist if the machine is under warranty service. Any intervention in the design, other than cleaning the filters, may be grounds for refusal of warranty repairs. Save your nerves and time.
FAQ: Frequently asked questions
Why does the tap light up if there is water in the tap?
This means that there is water in the water supply, but it is not entering the machine or is not detected by sensors. Reasons: the filter mesh is clogged, the hose is pinched, the inlet valve is faulty or the flow sensor is broken.
Can I continue washing dishes if the faucet light is on?
No, you cannot operate the machine with the tap indicator on. The washing program will not start, and attempts to force it on may result in the heating element or pump burning out.
How to reset a tap error on a Bosch dishwasher?
Try turning off the machine with the button, then unplug it for 10-15 minutes. After switching on, run the program again. If the error is caused by a temporary electronic failure, it will disappear. If the reason is physical (no water), the error will return.
What to do if AquaStop is triggered?
It is necessary to turn off the water, unplug the machine, take it out and remove the bottom cover. Scoop out the water from the pan and dry it with a hairdryer. After drying and eliminating the cause of the leak, the error should disappear.
Does a Bosch flow sensor often break down?
The flow sensor is a reliable element, but it can fail due to power surges or contamination with limescale. This happens more often in areas with hard water, so it is recommended to use water softeners.