Flashing lights or alphanumeric code appear on the dishwasher display Ariston often takes the owner by surprise. Instead of clean plates, you get an alarm that requires immediate attention. Modern models such as Ariston LSF 723 or series Indesit (produced at the same factories) are equipped with a sophisticated self-diagnosis system, which detects the slightest deviations in the operation of components.
Understanding what a specific signal means allows you not only to save on calling a repairman, but also to prevent more serious damage. Often the problem can be resolved by simply cleaning the filters or restarting the program, but ignoring critical errors can lead to electronics leaking or burning out. In this article we will analyze in detail all types of codes, from standard F-errors to specific series signals Hotpoint and Ariston Professional.
Operating principles of the self-diagnosis system
The electronic control unit (ECU) of the dishwasher continuously polls sensors installed in various components of the unit. Aquastop, pressure switch, thermostat and turbidity sensor send signals about the state of the water, its temperature and level. If the received data falls outside the tolerances stored in the memory, the ECU blocks the execution of the program and displays the code on the control panel.
It is important to distinguish between the types of indication, since in different models Ariston they may look different. On digital displays, the error is shown as a letter and a number (for example, F05). In models without a display, where control is carried out by buttons, the code is transmitted through the blinking of the indicators. Usually the indicator of the corresponding washing phase or a special LED with an exclamation mark blinks.
⚠️ Attention: If the machine emits a continuous beep along with an error code, this often indicates an emergency situation due to water leaking into the pan. In this case, you must immediately shut off the water supply.
The diagnostic system also takes into account the sequence of actions. For example, if a door is opened during a cycle, the machine may not generate an error immediately, but will interrupt heating. Logical errors often occur during power surges in the network, when the ECU receives conflicting data from sensors.
Why can codes go wrong?
Sometimes, after a power surge, the machine may “remember” a false error. You can reset it by holding the "Start/Pause" button or a combination of buttons (depending on the model) for 3-5 seconds until a characteristic sound signal is heard.
Decoding the main errors of the F series
The most common group of malfunctions in dishwashers Ariston marked with the letter F. These codes cover a wide range of problems, from lack of water to malfunctioning circulation pump. Let's look at the most common ones that users encounter.
Error F01 indicates problems with the electronic control module. This could be a memory failure or physical damage to the board. At the same time, the code F02 indicates a malfunction of the circulation pump motor. The machine draws water, but cannot start the washer because the impeller does not rotate or is jammed.
- 🔧 F03 - Malfunction of the water heating sensor (NTC). The machine cannot detect the temperature of the liquid.
- 💧 F04 - Problem with the fill valve. Water does not enter the tank or, conversely, does not shut off.
- 🚿 F05 - Drain pump error. Water does not leave the machine after a cycle.
- 🌡️ F06 - Program selection error or malfunction of control panel buttons.
- 🔄 F07 - Malfunction of the heating element (heating element). The water does not heat up to the set temperature.
The error deserves special attention F09 (or F9 on some models) which indicates an EEPROM memory failure. This means that the program settings have been lost or damaged. Often, elimination requires flashing the module or replacing it.
Most F series errors associated with pumps (F02, F05), in 60% of cases, are caused not by motor failure, but by clogged filters or foreign objects entering the impeller.
Specific codes H, A and E
In addition to the standard F series, in dishwashers Ariston There are codes starting with other letters. They often refer to specific functions or display types. For example, H series codes are usually associated with the system AquaStop or the water level in the car.
Code H20 (or just a flashing H) often indicates that the machine is unable to draw the required amount of water in the allotted time. This may be caused by low pressure in the water supply or a kinked inlet hose. In some cases, this is a signal that the water supply tap is closed.
| Error code | Description of the problem | Probable Cause | User Actions |
|---|---|---|---|
| A01 / A1 | Control board fault | Voltage surge, contact oxidation | Reboot, check wiring |
| E01 / E1 | Leak (Aquastop) | Water in the pan of the car | Disconnect from the network, fix the leak |
| H20 | Problem with water intake | Low pressure, filter clogged | Check the tap, clean the mesh |
| F13 | Turbidity sensor error | Sensor contamination, cable break | Clean sensor, check connection |
E-series errors such as E01, are most often synonymous with activating the leakage protection system. In the pan at the bottom of the car there is a float, which, when floating, opens the circuit and turns on the drain pump in emergency mode. If you see this code, you absolutely cannot operate the machine until the cause is eliminated.
Diagnosing drain and pump problems
One of the most common reasons for calling for service is the inability to pump out water. Errors F05, F15 or a flashing drain light indicates that the cycle is complete but water remains in the tank. Before disassembling the machine, it is necessary to perform initial diagnostics.
First, check the drain hose. It should not be pinched, twisted or raised too high. The optimal lifting height of the drain hose is 60-80 cm from the floor level. If the hose is lying on the floor, spontaneous draining may occur and the machine will constantly draw water, which can also cause an error.
⚠️ Attention: Before checking the drain pump, be sure to disconnect the dishwasher from the electrical outlet. Rotating the impeller with your finger while the power is on may result in electric shock.
If the hose is clean, the problem may lie in the dirt filter or the pump itself. Food scraps, fruit pits, or glass shards often get stuck in the pump impeller, blocking its rotation. In this case, the motor hums, but does not pump water, which is recorded by the electronics as an error.
☑️ Checking the drainage system
Malfunctions of the heating system and sensors
If the dishwasher Ariston washes with cold water or the cycle takes forever, most likely the problem lies in the heating element or temperature sensor. Errors F07 (TEN) and F03 (NTC sensor) are classic representatives of this group.
Scale is the main enemy of heating elements. Salt deposits create an insulating crust, causing the coil to overheat inside the shell and burn out, or the temperature sensor reads incorrect data. In some cases, error F07 occurs due to oxidation of the contacts on the heating element itself, and not its combustion.
The NTC sensor is a thermistor whose resistance changes depending on the water temperature. If its readings “float” or the circuit breaks, the machine goes into emergency mode to prevent water from boiling or operating without heating (which will disrupt the process of dissolving the detergent).
To extend the life of the heating element, use special salts for dishwashers and regularly (once every 3-6 months) run a wash cycle with citric acid or a special cleaner.
Algorithm for resetting errors and rebooting
Sometimes the error is temporary and caused by a power surge or momentary network outage. In such cases, a complete reset (reset) of the dishwasher settings helps. This action returns the ECU parameters to factory values and clears the RAM of temporary errors.
For most models Ariston The reset procedure is as follows: you need to hold down a certain combination of buttons (often the power button or “Start/Pause”) for 3-5 seconds until a beep sounds. On models with a display, you may need to press two buttons at the same time, for example, "Rinse" and "Delay Start".
If, after resetting, the error appears again when starting any program, it means that the malfunction is hardware in nature and requires intervention. Constantly ignoring repeating codes can lead to the failure of more expensive components, such as the main control module.
Secret combination
On some Ariston models, a full reset (Factory Reset) is performed by holding the "On/Off" button for 10-15 seconds until all indicators light up. After this, the machine must be turned off and turned on again.
Frequently asked questions (FAQ)
What to do if the error code does not match any known ones?
If an incomprehensible symbol or combination that is not in the instructions is lit on the display, try performing a complete reset of the program. It is also possible that your model belongs to a new series where the logic of the codes has been changed. In this case, it is better to contact an official dealer or check the model on the manufacturer’s website.
Can I continue to use the car if error F05 is on?
Strongly not recommended. Error F05 means that the water is not drained. Trying to restart the wash will result in the tank overflowing and, most likely, leaking onto the floor, which could flood your neighbors.
Why does the machine give an error immediately after turning it on, before starting the wash?
This indicates that the malfunction was detected during the previous cycle and “remembered” by the module, or the problem is constantly present (for example, the heating element or sensor burned out). The machine performs a self-test at start and blocks the start.
How often should filters be cleaned to avoid mistakes?
It is recommended to rinse the coarse filter under running water after each washing cycle. The fine filter and spray screen should be cleaned with a soft brush and detergent at least once a week.