What does fault code A01 mean in Ariston?

Name: Ariston Gas Valve Basic 23 MFFI SIT Ref. 999089
Brand: Ariston
SKU: MTS571425
Price: 55 EUR
Availability: InStock

Ignition fault: the burner does not ignite within the safety time. SIT 845 gas valve (ref. 999089) does not open/flow despite receiving a command from the PCB, causing absence of flame. Check during the ignition attempt that the valve receives voltage and that the coils have continuity; if there is a command and no gas/flame, the valve is faulty.

RefurbishedAriston Gas valves

Ariston Gas Valve Basic 23 MFFI SIT Ref. 999089

55 €VAT includedIn stock · 5 units

Gas valve: refurbished spare part that regulates and modulates the gas flow to the burner. Useful if there are ignition faults or the flame does not modulate. Reference 999089. Includes a one-year warranty and delivery within 2–4 working days in the EU.

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Delivery in 2–4 working days

1-year warranty

14-day return

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Key Data

Reference: 999089
Brand: Ariston
Type of part: Gas valves
Available units: 5 units in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

Code	What does it mean?	Cause and diagnosis (this part)
A01	Ignition fault: the burner does not ignite within the safety time.	SIT 845 gas valve (ref. 999089) that does not open/flow despite receiving a command from the PCB, causing absence of flame. Check during the ignition attempt that the valve receives voltage and that the coils have continuity; if there is a command and no gas/flame, the valve is faulty.

Ariston Gas Valve Basic 23 MFFI SIT Ref. 999089

Key Data

Spare Parts Related Boiler Basic 23 MFFI SIT