Ariston Washing Machine Error Codes: Complete Guide and Fixes (2026)

by:Ariston Support March 27, 2026 0 Comments

When your Ariston washing machine displays a fault code, it is the machine’s way of telling you exactly what is wrong. Each code maps to a specific system failure, whether that is a blocked drain pump, a faulty door interlock, or a heating element problem. This guide covers every Ariston washing machine error code across the standard range, LCD EVO1, and LCD EVO2/V4 model series, so you can diagnose and fix the problem without guesswork.

Important: If your Ariston washing machine has no digital display, error codes are communicated through LED flashes. Count the number of consecutive flashes and that number is your fault code. For example, 5 flashes means F05.

Ariston Standard Range Washing Machine Error Codes
Ariston LCD EVO1 Fault Codes
Ariston LCD EVO2 and V4 Fault Codes
Troubleshooting Tips Before You Call an Engineer
Frequently Asked Questions

Ariston Standard Range Washing Machine Error Codes

These fault codes apply to the Ariston standard washing machine and washer dryer range. On machines without a digital display, count the LED flashes to identify the code.

Error Code	Fault Description	Cause	How to Fix
F10	No Cold Fill	Machine is not receiving cold water and the drum will not fill.	Check cold water tap, inspect hose for kinks, clean inlet valve filter, replace solenoid if faulty.
F11	No Hot Fill	Machine is not receiving hot water. Temperature may be too low.	Ensure hot tap is open, check for frozen pipes, inspect hose and clean inlet filter.
F12	No Mixed Fill	Machine cannot detect both hot and cold water filling.	Open both taps, check hoses, clean filters, remove limescale buildup.
F13	Water Supply / Valve Fault	Issue with water supply, valve, or hose connections.	Check pressure, inspect connections, test inlet valve with multimeter.
F14	Water Heating Fault	Heating system failure prevents cycle completion.	Test heating element, check wiring, inspect thermal fuse, replace if needed.
F15	Drain Pump Fault	Water not draining; risk of overflow.	Clean pump filter, raise hose height, check for blockages.

Ariston LCD EVO1 Washing Machine Fault Codes

The LCD EVO1 range features a more detailed diagnostic system than the standard range. These codes appear on Ariston models with an LCD display panel. Note that on EVO1 machines, F10 refers to a pressure switch fault rather than a water fill issue.

Ariston LCD EVO2 and V4 Washing Machine Fault Codes

The EVO2 and V4 series are more recent Ariston models featuring updated electronics. They share most fault codes with the EVO1 range but add two new codes, F17 for a door interlock error and F18 for an internal communication fault. F09 on EVO2 is described as a generic setup error rather than an EEPROM-specific fault.

Troubleshooting Tips Before You Call an Engineer

Before booking a repair visit, try these steps first. They resolve the majority of Ariston washing machine fault codes and cost nothing.

Perform a Hard Reset

Turn the machine off at the mains wall socket and leave it unplugged for 60 seconds. Plug back in and restart the machine. This clears temporary error flags stored in the control board memory. If the code does not return, the fault was a one-off and the machine is fine to use.

Clean the Drain Pump Filter

The drain pump filter is the single most common cause of fault codes on Ariston washing machines. It is located behind a small rectangular access panel at the bottom-front of the machine. Place a towel and shallow tray underneath, unscrew the cap slowly, and clear any lint, coins, or debris. Clean this filter every one to two months to prevent recurrence. This fix resolves F05, F11, and F15 in the majority of cases.

Check the Water Taps

Open both the hot and cold taps behind the machine fully. A partially closed tap is the single most common cause of H20, F10, F11, and F12 error codes. After opening the taps fully, run a short wash cycle to confirm the fault has cleared.

Clean the Inlet Valve Filters

Remove the inlet hoses from the back of the machine. Inside each hose fitting is a small mesh filter screen. These collect limescale and debris over time, restricting water flow. Clean them with a toothbrush and a little white vinegar, rinse thoroughly, and refit the hoses.

Check the Drain Hose Height

The drain hose standpipe should be raised to at least 40 to 50cm from the floor. If the hose sits too low, the machine syphons water out as fast as it fills, triggering fill-related fault codes. Secure the hose at the correct height using the hose guide clip that came with the machine.

Close the Door Firmly

Push the door shut firmly until you hear and feel a definite click. Check that no clothing is trapped in the door rubber gasket seal. On EVO2 and V4 models, the door must engage the latch fully before the interlock activates.

Note: Error codes F01, F07, F08, F09, and F18 involve live electrical components on the control board. Always switch off at the mains and contact a qualified Ariston engineer for these faults. Attempting PCB repairs without proper training is dangerous.

Frequently Asked Questions (FAQs)

How do I reset an Ariston washing machine error code?

Turn the machine off at the mains socket and leave it unplugged for 60 seconds. Plug it back in and restart. This clears temporary error codes from the control board memory. If the same code returns after a reset, the underlying fault still exists and needs to be addressed.

What does H20 mean on an Ariston washing machine?

H20 is a reference to H₂O, the chemical formula for water, and it means the machine is not filling. The most common cause is the cold water tap behind the machine being turned off or only partially open. Check this first, then inspect the inlet hose for kinks, and clean the mesh filter screen inside the inlet valve hose connection.

What does F05 mean on an Ariston EVO1 or EVO2 washing machine?

F05 means the pressure switch is stuck in the full position. This is often caused by a blocked drain pump filter. Clean the pump filter first. If the fault persists, inspect or replace the pressure switch or its connecting hose.

Why is my Ariston washing machine flashing but showing no error code?

Models without a digital display use LED flashes to show errors. Count the flashes—this equals the fault code (e.g., 5 flashes = F05). A pause between flashes helps you count accurately.

How do I know if my Ariston washing machine is EVO1 or EVO2?

Check the model number inside the door rim. EVO1, EVO2, or V4 will be listed. You can also verify using the Ariston support website with your model number.

Is it safe to keep using my Ariston washing machine when a fault code is showing?

No. Stop using the machine until the issue is resolved. Some codes indicate risks like flooding or overheating, so always investigate before running another cycle.

What is the difference between Ariston EVO1 and EVO2 fault codes?

Both share most codes (F01–F12 and H20). EVO2/V4 adds F17 (door interlock) and F18 (internal communication fault). EVO2 also labels F09 differently as a setup error.