Bosch dishwashers are famous for their reliability. The products of this company have been operating for many years without breakdowns. The process is fully automated. If there is a deviation from the set parameters, sensors send signals to the control module, which opens the electrical circuit, stopping the operation of the installation. In this way, the monitoring system prevents serious malfunctions. This article will tell you how to decipher error codes for Bosch dishwashers.
The most common errors and their codes
Deviations of controlled parameters from the norm are usually called errors or interference. Each of them has its own designation. The latest generation devices are equipped with a display panel. When an emergency stop of the washing mashine occurs, the letter “E” (from English Error) + digital number is displayed on it. In some models, instead of “E,” “F” appears (from German Fehle—error), and the digital values remain unchanged.
While the owner PMM Bosch has the right to warranty repairs of its device, the reasons for the stops and the problems should be fixed by service center specialists. If the warranty period has expired, it makes sense to try to fix the problems yourself. The error message will help to determine the nature of the failure and the faulty unit of the dishwasher.
Water heater malfunctions
Code E01 informs the owner about the problem with the tubular electric heater (TEN). There is a high probability that it is unsuitable for operation. It needs to be replaced. At the same time, the temperature sensor is checked for correctness. It may be giving incorrect commands.
The display screen displays messages E02 / E01 . These errors mean incorrect operation of the water temperature control sensor. It does not transmit signals to the control unit. The heater, not receiving a command to reach the set temperature, will constantly heat already hot water. This mode will cause its premature failure. In addition, constantly consuming the maximum load, the heater overspends electricity. To avoid losses, this problem should be fixed immediately.
E09 is a message about the failure of the heating element. You will need to measure its resistance with a multimeter. If it is "0", the heating element will have to be replaced.
Code E11 indicates to the owner of a Bosch dishwasher that the temperature sensor is left without power. There is no connection between it and the control module.
There may be several reasons for this:
- The sensor connection contact is broken;
- The wiring between it and the control board is damaged;
- The board contact is broken.
Before fixing the damage, you need to disconnect the dishwasher from the power supply.
E12 meansthat the heater is drawing excessive load. The reason for this may be scale and dirt accumulated on its surface in a thick layer. If you reset the dishwasher, may be highlighted code E09. Although the digital value has changed, the message indicates the same interference. The heating element can be cleaned of deposits yourself. To do this, you will need to partially disassemble the dishwasher, remove the heater, clean the heating element and reassemble in the reverse order. Work is carried out in compliance with safety rules, with the power supply turned off.
Codes indicating problems with water drainage
The most frequent stoppages of Bosch dishwashers occur due to difficult drainage due to the fault of owners who violate the instructions for using the device. Error E7 indicates that the drain hole is clogged. It is impossible to pump water out of the pan.
This kind of interference is displayed if the operating rules are not followed:
- The dishes are loaded incorrectly;
- The dishes blocked the drain;
- The drain is clogged with food waste and fat deposits.
To fix this, it is enough to correctly place the dishes in the basket, make sure that they do not interfere with the free flow, and clean the filter and drain of food residues and grease. After this, the device performs its functions without interference.
These operations must be performed at the frequency recommended by the manufacturer, without waiting for stops due to E7 errors. The result of this simple procedure will be uninterrupted operation of the Bosch dishwasher.
E21 means, that the drain pump does not work because:
- The impeller does not rotate. This happens when the drain filter is not cleaned for a long time. Debris, food debris, bones, jam the impeller.
- The electrical wiring is damaged, the contacts are oxidized, and the pump's electric drive windings are damaged.
- The rotor is stuck and does not rotate. No lubrication.
You can restart the machine. If message E21 not displayed, a software failure has occurred.
When it reappears on the screen, proceed to troubleshooting according to the following scheme:
- Disconnect the dishwasher from the water supply, sewerage, and turn off the power;
- Open the door, remove the baskets;
- Unscrew the drain filter, providing access to the pump;
- Unscrew the mounting screws and remove the cover;
- Inspect the impeller, remove accumulated debris;
- Proceed with inspection.
To do this, turn the device upside down, remove the fasteners, and remove the cover. Then disconnect the power wires and remove the pump by unscrewing it counterclockwise. The pump mechanics are inspected, and any foreign objects found are removed. The electrical part is checked with a multimeter. If damage is detected, the unit is replaced.
E22 means, that the internal filter elements are clogged with dirt. Needs replacement.
Sometimes this interference occurs from a decrease in the speed of the impeller. To eliminate the problem, the same operations are carried out as for error E21.
E24 indicates for difficult drainage of water from the sump due to a kinked hose or clogged sewer. The drain siphon may be blocked. Violations are easily resolved. It is necessary to determine which of them occurs and perform the necessary operations. A broken or clogged hose is replaced. When purchasing, select a durable sleeve of the required length and diameter.
The control module, having received an alarm signal from the sensor, stopped Bosch dishwasher, issued message E25. This means the drain pipe or drain hose is clogged.Their internal diameter has decreased. This prevents the pump from pushing water through them.
The interference is eliminated as follows:
- The device is disconnected from the power supply;
- The hose and drain pipe are cleaned of deposits;
- The impeller is checked for the presence of objects that interfere with operation. Cleans if necessary.
Codes indicating problems with water supply/drainage
On startup Bosch dishwasher according to a given program, water must fill the chamber within a certain time. If this does not happen, the device stops. In the latest models of dishwashers, the water is automatically drained, after which the display shows E3 message.
To eliminate the interference, you need to make sure that water is supplied from the water supply network at normal pressure. Then you should check the condition of the input filter elements. After this, the inlet valve and the sensor that controls the water level are checked. If the problem is not solved, the pump is checked for serviceability.
Appearance E5 errors indicates that the machine tank is full of water. The process is controlled by a level sensor.
If it breaks down, the pump does not receive a signal to turn on from the control module as a result of:
- Clogged sensor inlet;
- Melting of his working contacts;
- Damage to electrical wiring.
If checking the sensor shows that it has nothing to do with it, proceed to diagnosing the intake valve. Something prevents it from closing 100%, so water constantly stays in the tank. Possible message E5 appears as a result of a control module failure. Specialists should deal with such problems.
E8 means: “little water in the pan.” The activation of the circulation pump and heater is blocked.Searching for causes and eliminating them are carried out in the same way as with E3 interference.
E16 indicates for a problem with the fill valve. It does not close on command, constantly letting water through. The most likely cause is dirt getting under the valve. This prevents it from closing tightly. The tank is filled with water even after the device is turned off. To eliminate the problem, the valve with the pipes connected to it is inspected and, if necessary, cleaned. The level sensor is checked. One of the reasons for the failure may be excessive foaming from a large amount of detergent.
A Bosch dishwasher stopping can be caused by high pressure on the water supply. The intake valve is not able to overcome it and cannot close at the command of the control module.
Code E17 appears on the display. To remove the error, you will need to close the tap on the supply pipeline, reducing the pressure in front of the valve. If E17 continues to light, the sensor status is checked. It happens that this interference appears after a pressure surge in the water supply network. In such a situation, restarting the dishwasher helps.
Electrical fault messages
Modern models of Bosch dishwashers are equipped with sensors, electromagnetic shut-off and control valves, microswitches, and pumps. Signals are exchanged between them and the control board via wires, connecting parts, and contacts. The slightest damage in the electrical circuit leads to error messages.
E01; E30 signal about damage to electronics or electrical circuits. The easiest way to restart the dishwasher is to use the on/off button. In case of a simple program failure, the messages disappear from the screen.The dishwashing process can be resumed. If the reboot does not give a positive result, you should call a service center specialist to your home. He will carry out diagnostics using special devices, identify faults, and begin to eliminate them.
Code E27 appears on the displays of Bosch dishwashers as a result of a power surge. To protect your device from short circuits, you need to acquire a stabilizing device.
Error codes indicating faulty sensors and switches
Automatic control of the operation of Bosch dishwashers cannot be realized without sensors and other electronic elements. The self-diagnosis system detects such failures. Corresponding messages appear on the display.
E4 indicates, that the pressure/water flow control sensor in the sprinklers is not functioning correctly.
Possible reasons:
- Mechanical damage;
- Clogging;
- Hard water that clogs the nozzles with solid deposits.
The appearance of the code E6 reports about a malfunction aquasensor. This sensor monitors the turbidity of the water. If the dishwasher is loaded with dishes that are not very dirty, it eliminates the rinse function. This allows you to reduce energy consumption. To fix this problem, the sensor is most often replaced. Sometimes cleaning or replacing its contacts helps.
E14 makes it clear, that there is no control over the amount of water in the tank. You should not try to fix the error yourself. It is better to entrust this work to a specialist.
Code E15 means that the system reacted "Aquastop". One of the elements is leaking inside the device.It is necessary to inspect the pan, hoses and other elements in this area. Detected leaks are repaired. Flexible connections must be replaced, other parts are repaired until the tightness is restored.
How to recognize errors in machines without a display
A number of Bosch dishwashers are not equipped with a display. If such a model fails and stops, the “Crane” indicator light on the panel will light up. To recognize the interference, you will need to put the machine into maintenance mode, which is called service mode.
Why malfunctions occur and how to avoid them
Bosch dishwasher—reliable appliances. But this will not save it from breakdowns if you do not follow the basic rules of its operation. Loading dishes that have not been cleaned of food residues will cause clogging of the filters, drain hole, and stopping the drain pump. Careless connection to the power supply may result in a short circuit, possibly causing injury to the user.
An excessive length of the drain hose or a leaky connection to the water supply system will lead to leaks and emergency shutdowns of the unit. It will be better if this work is performed by an experienced specialist. Incorrectly loaded dishes will create many inconveniences in its operation. Frequent stoppages, breakdowns, and repairs will follow.
Before starting operation, you must carefully read the instructions, check the tightness of the connection to the water supply, and correctly place the dishes in the device in accordance with the manufacturer’s requirements.This will save the washing mashine from overloads and breakdowns, and the owner from unnecessary hassle.
