Indicator 5 on the dishwasher is on Ariston at the moment when you planned to start the washing cycle, which clearly indicates that the water supply is blocked due to the lack of a signal from the pressure sensor or critically low pressure in the system. This electronic reaction is a standard protective mechanism that prevents the pump from running dry, and requires an immediate check of the water supply or the condition of the inlet valve. Unlike other codes, this parameter does not always mean a breakdown of the device itself; often the problem lies in external factors, such as a closed tap or a clogged filter.
Ignoring the flashing indicator or trying to force a program without eliminating the cause may lead to overheating of the circulation pump. Modern models dishwashers Hotpoint-Ariston are equipped with sensitive diagnostics that record the time of filling the tank, and if water has not been supplied in the required volume during the allotted interval, the cycle is interrupted. Understanding the physics of the process helps to quickly localize the source of the problem, be it a simple bend in the hose or a failure of the electronic control module.
Decoding the code and the principle of operation of the sensors
Code errors 5 in technical documentation Ariston corresponds to a malfunction in the water intake circuit. The electronic control unit (ECU) sends a pulse to open the solenoid valve and simultaneously starts the timer. If the pressure switch (water level sensor) does not detect a change in pressure in the system within the set time, the controller stops the program and displays an alarm on the display or control panel.
It is important to distinguish between a static lack of water and a dynamic pressure drop. In the first case, the tap may simply be closed, in the second, water flows, but its pressure is not enough to trigger the sensor membrane. Critical threshold Often the pressure is below 0.04 MPa, at which the machine physically cannot collect the required volume of liquid.
⚠️ Attention: Do not attempt to disassemble the dishwasher body until you are sure that the device is completely disconnected from the power supply. Working with electrical appliances in conditions of high humidity requires compliance with safety regulations.
The diagnostic system may display this code differently depending on the series of dishwasher. On models with a digital display, you will see the number "5", while on budget versions without a screen, a fifth indicator in a row or a combination of LEDs may flash. The exact interpretation depends on the specific Ariston models, but the logic of the inlet valve remains the same for most devices of the brand.
Primary diagnostics of water supply
Before looking for a breakdown inside the case, it is necessary to exclude external factors. The most common reason for the appearance of the fifth code is the banal lack of water in the tap. Check that the shut-off valve on the pipe leading to the dishwasher is open. Sometimes residents turn off the water for other needs and forget to return the tap to its original position.
The next step is to check the pressure. Unscrew the water supply hose from the machine (after placing a bucket) and open the tap. If the water flows in a weak stream or drips, the problem is in the apartment's plumbing system, and not in the equipment. Low pressure is not able to push through the inlet filter and open the valve.
It's also worth checking out for yourself. inlet hose. Bends, pressure from furniture or twisting block the flow of fluid. Even if the hose appears intact, deposits may have formed inside or the rubber seals may have swelled, narrowing the passage opening.
Cleaning filters and inlet valve
If the pressure in the tap is good, but the dishwasher Ariston it still gives an error, most likely the filter mesh is clogged. It is located directly in the inlet of the machine, where the hose is screwed. Small debris, rust or sand from the pipes quickly clog the cells, reducing the throughput to zero.
To clean, you need to turn off the water, disconnect the hose and carefully remove the filter using pliers or tweezers. Rinse the mesh under strong running water, using an old toothbrush to remove sticky deposits. Do not use sharp objects to avoid damaging the small cell.
☑️ Checklist for checking the water intake system
After cleaning the filter, check the condition of the solenoid valve. Metal shavings can also accumulate inside its coil (if the pipes are old), which interferes with the movement of the core. Blowing out the valve or carefully disassembling it (if you have the skills) can restore the operation of the unit without replacement.
Checking the pressure switch and aqua stops
When external causes are excluded, attention shifts to internal components. Pressostat is a sensor that tells the “brains” of the machine about the presence of water. If its tube is clogged or there is water in it, the readings will be incorrect. Remove the tube and blow it out, check the tightness of the connections.
Some models Ariston The Aquastop system is used, which includes a float mechanism in the pan. If there is water in the pan (even a little), the float floats up and activates the emergency drain, blocking the intake of new water. In this case, error 5 may be secondary. Check the bottom of the machine for leaks.
| Component | Problem Symptom | Test method |
|---|---|---|
| Input filter | Weak water supply, noise | Visual inspection, washing |
| Electrovalve | No click, no water | Calling a coil with a multimeter |
| Pressostat | Overfilling or underfilling | Purge the tube, check the contacts |
| Inlet hose | Water does not flow | Inspection for kinks, purging |
Solenoid valve diagnostics
If there is water, the filter is clean, but the valve does not open, its coil may have burned out. This happens during power surges in the network. The test is carried out with a multimeter in resistance measurement mode. Normal value for valve coil Ariston usually ranges from 2 to 4 kOhm.
If the device shows an open circuit (infinity) or a short circuit (zero), the valve must be replaced. Sometimes the mechanical valve stem itself jams due to scale. In such cases, you can try to gently tap the valve body with the handle of a screwdriver while the water intake program is on in order to dislodge it, but this is a temporary measure.
How to Replace a Valve Coil
Remove the top cover of the dishwasher. Locate the inlet valve (usually on the top left or right). Disconnect the wires and remove the coil (it is held on by latches). Install the new part and check for leaks.
When replacing, make sure that the new part matches the original in voltage and connection type. Using unsuitable components may cause the control board to burn out.
Control module malfunctions
The most difficult and expensive case is the failure of the electronic module. If all the actuators are working properly, water flows in, the valve opens, but after a while the machine still gives error 5, perhaps the valve control triac on the board is “buggy.”
Often traces of oxidation or swelling of the capacitors are visible on the board, especially if the dishwasher is installed in conditions of high humidity without proper ventilation. Repairing a module requires qualifications and special equipment; at home, you can only visually assess its condition.
⚠️ Attention: Replacing the control module requires flashing or configuration for a specific model. Do not buy used boards without a guarantee of compatibility with your software version.
In some cases, resetting the error by turning off the power for a long time (15-20 minutes) helps. If, after enabling and running the test program, the error returns immediately or after a fixed interval, a software failure is unlikely and the problem is hardware in nature.
Tip: Before calling the wizard, try running the “Rinse” mode. If the water fills normally, there may be a problem with the turbidity sensor or the logic of the main wash cycle.
When you need to call a specialist
Do-it-yourself repairs are justified if the problem involves cleaning filters, checking hoses, or replacing easily accessible parts like valve coils. However, if it is necessary to disassemble the case, remove the front panel to access the module, or replace a pressure switch built into a complex assembly, it is better to contact specialists.
This is especially true for new models with a warranty. Opening the seals automatically voids the manufacturer's warranty. In addition, the master has original spare parts and diagnostic equipment for accurate measurement of parameters in real time.
The main conclusion: 80% of cases of error 5 are solved by cleaning the inlet filter or checking the water supply tap.
Prevention of repeated errors
To prevent error 5 from bothering you in the future, it is recommended to install a main coarse filter at the water inlet to the apartment. This will protect not only the dishwasher, but also the washing machine, faucets and other plumbing fixtures from rust and sand.
Regularly, at least once every six months, check the condition of the inlet hose and, if necessary, clean the inlet mesh. Even if there are no visible problems, preventative cleaning will take 5 minutes, but will save you from equipment downtime and flooding.
Why does error 5 appear only on some programs?
Different washing programs require different volumes of water. If the pressure is borderline, in short cycles the water may have time to accumulate, but in long or intense modes the sensor will record underfilling, giving an error.
Is it possible to use a dishwasher with error 5?
No, operation is not possible. The machine will not start a wash cycle without water. Attempts to deceive the sensor can lead to combustion of the heating element (heating element) or pump, since they only operate in an aqueous environment.
How much does it cost to repair if a valve burns out?
The cost consists of the price of the spare part (usually inexpensive) and the work of the technician. On average, replacing an inlet valve is less expensive than repairing a pump or control module.