Bosch dishwasher repairs begin with the precise identification of the error code displayed on the display or the analysis of the specific sound of the equipment in operation. If the device makes a hum, but the water does not come, or, conversely, hums too loud when draining, this is a direct indication of a malfunction. circulation pump Or a clog in the filtration system. Unlike many other brands, Bosch equipment often signals problems by flashing salt and rinse indicators, which requires the correct decoding to choose the method of restoring the unit.
Before disassembling the body, it is necessary to exclude banal reasons: check whether they are bent. drain-hoseWhether the water supply tap is open and the door is tightly closed. Often users are faced with the problem when the machine is gaining water and immediately drains it β this is a classic symptom of work. waterstop or improper connection of the sewer. Ignoring these primary signs can lead to more complex breakdowns, such as failure. electronic management.
For a high-quality diagnosis, you will need a multimeter, a set of screwdrivers and, possibly, passages. It is important to understand that most of the nodes in dishwashers Bosch Serie 4 or Serie 6 Modular, which allows you to replace them without deep intervention in the design. However, if you see traces of burns on the board or smell the burning wiring, further hand-craft It may not be safe without proper electrical skills.
Decoding error codes and primary diagnosis
Modern Bosch dishwashers are equipped with a developed self-diagnostic system that displays alphanumeric codes or combinations of flashing indicators. The most common mistake E15 or E09 Often indicates the leakage of water into the pallet where the system is triggered. Aquastop. In this case, the machine blocks the start of programs and the drainage pump starts working continuously, even if you did not start the wash. To reset the error, it is often enough to tilt the car body forward by 45 degrees to pour water out of the pallet, and let the device dry during the day.
Another common code E22 signals a clog of the rough cleaning filter. If the filter is clogged with food residues, the water cannot circulate normally, and the water transparency sensor detects contamination, interrupting the cycle. Mistake. E24 indicates problems with the drain hose or pump: either the hose is bent, or clogged itself drain-pump. In some models where there is no display, flashing indicators report problems: for example, the simultaneous blinking of salt and rinse indicators often corresponds to the code. E15.
β οΈ Warning: Before taking any readings with a multimeter, be sure to disconnect the Bosch dishwasher from the electrical network. Working with a voltage of 220V in humid conditions is deadly.
If the display is lit up with code E01 or E02This indicates problems with temperature sensors or water heating. The machine may heat the water for too long or not at all, which causes the program to stop. In such cases, the integrity of the chain is checked. TEN. and the temperature sensor's performance. It is also worth paying attention to the state of the wiring going to the heating element, since the contacts could oxidize or burn.
If the machine gives an error, but after restarting the program starts, do not ignore the signal. Periodic failures often precede a complete node failure.
Problems with water recruitment and drainage
The lack of water intake most often lies in low pressure in the plumbing or malfunction. inlet-valve. The valve is an electromagnetic device that is opened by a signal from the control module. If you do not hear the characteristic click and hum of the valve when you start the program, and the water does not go, you need to check its coil on the cliff using a multimeter. The normal resistance of the coil varies between 4-6 kΞ©; if the instrument shows infinity or zero, the valve must be replaced.
On the other hand, if water is drawn but does not leave after the cycle ends, the problem lies in the drain system. First thing you do is check. drain-pump (pump) In Bosch dishwashers, it is located at the bottom of the case under the filter. Often the impeller pump jams a lemon bone, a piece of glass or fish bone. To check, remove the filter, scoop out the water and try to manually turn the impeller pump through the hole in the center - it should rotate with little effort, but without jamming.
- π Check the corrugated drain hose for bending and blockages at the connection point to the sewer.
- π Clean the return valve at the connection of the drain hose to the pump from fat deposits.
- π Call the drain pump winding: resistance should be in the range of 150-200 ohms.
If the pump is buzzing but not pumping and the impeller rotates freely, the graphite bushes may have worn off or the winding burned. In some cases, cleaning the axis of the impeller from scale helps, but most often, a replacement of the node in the assembly is required. It's worth checking out. pressostat (water level sensor), since when it sticks, the machine can "not see" the water and not start the pump, or, conversely, not see that the water has already been dialed, and pour the tank.
Diagnostics and replacement of the heating element
If the Bosch dishwasher completes the cycle, but the dishes remain cold and wet, and there is no characteristic evaporation on the glass, most likely, it has failed. heater (TEN). Modern Bosch models use a flow heater, which is a metal flask with built-in TEN. The inspection begins with a visual inspection: if the heater body shows bloating, cracks or traces of breakdown, the part requires immediate replacement.
For diagnosis, the multimeter is transferred to the resistance measurement mode. The probes are connected to the TEN contacts. The working resistance of a serviceable element with a capacity of 2 kW is approximately 25-30 Ohms. If the device shows one or infinity, then the nichrome spiral inside is broken. It is also necessary to check the breakdown on the body: one probe is put on the contact, the other on the metal body of the heater. The device must show infinity; any other meanings indicate a violation of insulation.
Replacement of flow heater is a procedure of medium complexity, requiring partial disassembly of the machine. It is necessary to remove the side wall (usually the left, if viewed from the front), disconnect the pipes and terminals. The new sealing ring when installed must be lubricated with heat-resistant lubricant to prevent leaks.
| Symptoms. | Probable cause | Method of verification |
|---|---|---|
| The water doesn't warm. | TEN's spiral break | Measurement of resistance (should be ~25-30 ohms) |
| Knocks the machine out | TEN failure on the hull | Contact and body vertebrae (should be infinity) |
| Heating error | Thermosensor malfunction | Measurement of sensor resistance at different temperatures |
| Leaking under the car | Wear of the heater sealer | Visual inspection of the flask adjoining location |
When replacing the TENS, always change the sealing ring. Old rubber loses elasticity and will flow when recompressed.
Repair of drying and ventilation system
In Bosch dishwashers with turbo drying (function) AirDry or Zeolith) a special fan is responsible for the circulation of air. If after washing the door does not open automatically, or the dishes remain wet, the problem may be in the fan motor or clogged ducts. In models with zeolite (mineral adsorbent), it is important to check whether the mineral has become damp and whether the channels are free for air passage.
Often users are faced with a situation where the ventilation valve that opens the door at the end of the cycle jams due to ingress of fat or detergent. The valve drive mechanism is located at the top of the front panel. To check it, you need to remove the upper cover and the decorative panel of the door. If the valve stem is tight, you can try to develop and clean it, but in the presence of mechanical damage, you will need to replace the unit.
Particular attention should be paid to the condition of the door seal if drying is inefficient. The loose adhesion of the door during the main wash leads to heat loss, and too dense - to the impossibility of steam exit at the end of the cycle. The adjustment of the tension of the springs of the door mechanism also affects the tightness of the camera. The springs are located on the sides of the body and are connected by cables to the door; their tension can be adjusted with a special hook through holes in the sidewalls.
The Secret to Perfect Drying
Use a quality rinse. It reduces the surface tension of water, helping it roll off the dishes, which accelerates drying.
Removal of leaks and replacement of seals
The appearance of a puddle under the Bosch dishwasher is a serious signal that requires an immediate response. In addition to the aforementioned pallet and Aquastop system, water can flow from under the door, from the connections of the pipes or through the cuff of the circulating pump. If water drips from the front, it is first checked. sealer perimeter of the door. Over time, it is covered with fatty plaque, tanning or deforming, ceasing to hold water.
To replace the seal, it is enough to remove the old profile from the groove and insert a new one, starting from the corners. Before installation, the new seal is recommended to be warmed in warm water, so that it becomes more elastic and easier to stand in place. If it flows from the bottom, but the pallet is dry (or the sensor does not work due to a breakdown), you need to remove the side panels and inspect the clamps on the pipes going to the sprinklers and the pump.
- π§ Check the integrity of the circulating pump cuff β a frequent spot of hidden leaks.
- π§ Examine the place of insertion of the drain hose into the siphon of the sink for blockages and backflow of water.
- π§ Make sure the machine is strictly horizontal; skewing can disrupt the water distribution system.
It is also important to check the integrity of the tank. In rare cases, the plastic tank can crack from a hydraulic shock or falling a heavy object (such as a knife) inside the chamber. Small cracks can be tried to close a special sealant for dishwashers, but this is a temporary solution. In case of serious damage to the tank, repair is often economically impractical.
β οΈ Note: If you find water on the floor, donβt just wipe it. Be sure to find out the source. Constant humidity under the machine leads to corrosion of metal parts and short circuit.
Prevention and maintenance for long service
To repair the dishwasher Bosch hands not required in the coming years, it is important to follow the rules of operation. Regular cleaning of filters is the key to the normal operation of the pump and the quality of washing. The filters should be washed under hot water using a brush at least once a week. Once a month, it is recommended to start the idle cycle with the addition of citric acid or a special cleaner to remove scale and fat deposits inside the system.
Use only quality detergents in the right dosage. Excess chemistry leads to foam formation, which can get into sensors and cause false positives or electronic errors. Also watch for the salt level in the tank: soft water prevents the formation of scale on the TEN and heat exchanger, which are among the most expensive elements to replace.
βοΈ Monthly TO
Don't overload the basket with dishes. If the plates are too tight, the water will not be able to wash them from all sides, and the load on the plates is very high. circulation-pump It will grow. Proper loading not only ensures clean dishes, but also prolongs the life of the mechanical nodes of your Bosch dishwasher.
Why does Bosch dishwasher buzz while working?
The hum can be caused by vibration of the housing against the furniture, the entry of a foreign object into the impeller of the pump or wear of the engine bearings. If a new pump is buzzing, it is normal in the first minutes of operation. Constant strong hum requires checking the pump and mounts.
Can I wash aluminum dishes in a Bosch dishwasher?
No, aluminum is oxidized under the influence of alkaline detergents, blackens and can stain other items. It is also not recommended to wash crystal, wood and cast iron without enamel.
What if the car does not turn on and the indicators do not burn?
Check the voltage in the socket, the integrity of the network cable and the operation of the network filter inside the machine. Often the fuse burns on the control board or at the entrance of the cable.
How often should you change the water softener (salt)?
It depends on the hardness of the water and the frequency of use. On average, one filling (1 kg) is enough for 2-4 months. The salt indicator on the panel will tell you when the stock will come to an end.