The situation when on the control panel of the dishwasher Bosch lights up or begins to flash the indicator in the form of a tap, signals a critical malfunction of the water intake system. This symbol is not just a reminder of the opening of the gate, it is a sign of the opening of the gate. emergency-stopwhich blocks the start of the washing program. Ignoring this signal or attempting to force the equipment to turn on can lead to kitchen flooding or electronics failure. In most cases, the self-diagnosis system records the absence of a water set for the allotted time or, conversely, the leakage of liquid into the pallet.
Modern models such as Bosch Serie 4 or Serie 6They are equipped with sensitive sensors that respond to the slightest deviations in the hydraulic circuit. If a tap catches fire, the machine forcibly turns on the drain pump to pump water out of the tank, preventing overflow. The user must act quickly and consistently at this point to determine the true cause of the failure. In 80% of cases, the problem is solved without a wizard by checking the pressure in the water supply or cleaning the inlet filter.
Signal decoding: Blinking or burning constantly
The first thing to do when detecting a burning indicator of a crane is to understand the nature of its glow. Different dishwashers on different models Bosch The logic of the indicators may differ, but the general principles remain. If the symbol is lit with a smooth red light, it most often indicates that the machine cannot draw water during a given cycle. The system makes several attempts to fence, and if they fail, it gives an error.
In the case when the indicator flashes with a certain frequency, it is a more complex diagnosis. Some models use flashing to indicate activation of the system AquaStop - leak protection. This means that the sensor in the pallet (at the bottom of the car) recorded the presence of moisture. Unlike the simple lack of water, immediate intervention is required, as the risk of flooding has already been realized inside the enclosure.
It is important to distinguish between these states, since the algorithm of actions will be radically different. With a smooth combustion, we look for problems with the supply of water from the outside, and when blinking - internal malfunctions or leaks. Do not try to run the program again until the root cause is eliminated, otherwise you can damage the control module.
⚠️ Attention: If the tap indicator flashes, and the machine buzzes (the drain pump is working) even when it is turned off, immediately close the water supply vent and disconnect the device from the power grid. It's a sign of an active leak.
External causes: pressure and water supply
The most common, but common reason for the appearance of the symbol of the tap is the lack of water in the water supply. If the house is scheduled work or there was a gust of pipe, dishwasher simply will not be able to perform the command of the set. In this case, the duct sensor does not work, and after 2-3 minutes of waiting, the machine gives an error. Check if the water is coming from other taps.
The second important factor is pressure. Dishwashers Bosch Minimum pressure is required to open the electromagnetic valve. If the pressure is too weak, the valve will not physically open and the machine will decide that there is no water. This often happens during peak water extraction hours or with clogged supply pipes.
It is also worth checking the condition of the feed hose. If it is bent, passed by furniture or stepped on it, the water current will be blocked. Visual examination of communications is the first step in diagnosis. Make sure the valve on the pipe is open completely and not jammed.
Filtering and valve netting
One of the most common technical reasons why the crane lights up is a banal clogging. Water from the central water main often contains rust, sand and lime deposits. At the entrance to the dishwasher, at the place of connection of the hose, a small net-filter. Its task is to detain large debris so that it does not fall into the electromagnetic valve.
Over time, this net clogs, turning into a dead stopper. Water stops coming in the desired amount, the timer of the set expires, and the machine gives an error. Cleaning this element is a simple procedure that is accessible to any user. It is also worth checking the rough cleaning filter if it is installed separately on the pipe in front of the machine.
☑️ Cleaning the inlet filter
In addition to the input grid, attention should be paid to the internal filters in the bottom of the washing chamber. Although their heavy contamination is more likely to cause plum errors (funnel symbol), in some algorithms the work is done. Bosch This can affect the overall cycle and indirectly cause failures of water level sensors.
For high-quality cleaning of the filter mesh, use an old toothbrush and citric acid. The acid will dissolve lime plaque that ordinary water may not wash away.
Problems with the AquaStop system
System system AquaStop This is a complex protection mechanism that prevents flooding of the apartment. It consists of a double hose, an electromagnetic valve and a pallet with a float at the bottom of the machine. If water appears in the pallet (even a little), the float pops up and mechanically or electrically activates the alarm. At this point, the tap lights up on the panel, and the machine begins to pump water endlessly.
The reasons for the operation can be different: from a real breakthrough of the hose inside the housing to banal foaming. The use of inappropriate detergents (such as gels for manual dishwashing) causes abundant foam that spills over the edge of the tank and enters the pallet. The sensor responds to moisture and blocks work.
| Symptoms. | Probable cause | Action. |
|---|---|---|
| Crane burns, pump buzzes | AquaStop float worked | Check the bottom for water. |
| Crane's on fire, silence. | No water pressure or clogged filter | Check the valve and net. |
| The faucet blinks, E09 error | Failure of the valve or wiring | Diagnostics with a multimeter are required |
| Crane burns after hose replacement | The float is stuck or damaged | Check the float's progress in the pallet |
If AquaStop is triggered, you can’t just turn the car off and forget it. We need to find the source of moisture. Often water enters the pallet due to microcracks in the nozzles or weakened clamps inside the casing. Visual inspection of the internal components after removing the side panels will help to localize the leak.
⚠️ Attention: Never ignore the AquaStop operation. Attempting to continue operating a wet-base machine can short-circuit and burn an expensive electronic module.
Electromagnetic valve malfunction
An electromagnetic valve is a gate that opens the way for water to enter the machine at the signal of the processor. If the pressure and filters are all right, and the crane is burning, there is a high probability of failure of the valve itself or its coil. Over time, the coil winding may burn out, or the core jams due to scale.
Valve inspection requires multimeter skills. You need to call the contacts of the resistance coil. Normal rates vary depending on the model, but a circuit break (infinite resistance) or a short circuit (about zero) indicates a malfunction. In such cases, it is required valve-replacement.
How to replace the water supply valve?
To replace the valve, it is necessary to remove the upper cover of the dishwasher (two screws at the back are usually unscrewed). Then the wires and hoses are disconnected from the old valve. The new one is set in reverse order. It is important not to confuse the wires and check the tightness of the connections after assembly.
It is also worth examining the wires going to the valve. In conditions of vibration and humidity, the contacts can become oxidized, and the insulation of the wires can be damaged by rodents or friction against the metal parts of the body. Poor contact does not allow full voltage to be applied to the coil and the valve does not open.
Failures in the electronic module
Rarely, but it happens that the problem lies in the very “brain” of the device – the electronic control module. If the relay controlling the water supply valve is stuck or burned, the water dial command will not be executed, although the indicator may signal the process. There may also be software failures.
In some cases, it helps to reset the error. For this purpose, on many models Bosch I need to press the button. Start (or a combination of buttons, for example, On/Off and the program select button) for 3-5 seconds. The machine will try to restart the cycle. If the error is repeated immediately, the software failure is excluded and the problem is hardware in nature.
If, after a complete reset and checking all external factors, the crane error persists, most likely, one of the sensors or actuators inside the housing is defective.
Diagnostics module requires professional equipment. Independently climb inside the control unit without knowledge in electronics is not recommended, as you can finally bring the device out of action. Often, repairing a module is more cost-effective than replacing the entire machine, especially for premium series.
Frequently Asked Questions (FAQ)
Can I use the dishwasher if the faucet is on fire?
It's not recommended. If the crane is on fire, the car is in emergency mode. The launch of the program can lead to the fact that the water does not accumulate (burn the heaters from idle work) or, conversely, overflow and flooding of the kitchen will occur if the level sensor is faulty.
What does the E09 or E15 error code mean on the display?
Code. E09 usually indicates a water supply valve malfunction or pressure problem. Code. E15 (or E24 in some models) most often means activation of the AquaStop system, i.e. the presence of water in the pallet of the machine. The exact decoding depends on the specific series. Bosch.
Why does Bosch dishwasher not draw water and the tap burn?
The main reasons: the tap on the pipe is blocked, the pressure in the water supply is low, the inlet filter mesh is clogged, the electromagnetic valve is defective or the leak protection has worked. Start your diagnosis by checking the availability of water in the tap and the cleanliness of the filter.
How to Reset a Fault in a Bosch dishwasher?
Try to turn off the car with a button, then pull the plug from the socket for 15-20 minutes. After activation, start the drain program. If the cause was a temporary electronic failure or pressure recovery, the error should disappear. If not, repairs are required.