How much does it cost to fix Ariston error code 1 08?

Typical repair cost for the Ariston 1 08 fault is £80-120 including labour.

1 08 High

Ariston 1 08 Fault Code

Q: What does the Ariston 1 08 fault code mean?

Your boiler has detected that the water pressure inside the system is too low, which prevents it from operating safely.

Also written as 108 — same fault.

The Ariston 1 08 fault code means: your boiler has detected that the water pressure inside the system is too low, which prevents it from operating safely.. It appears on 3 Ariston models in our database.

Technical description: Insuffi cient water (request fi lling)

Typical repair cost £80-120 (including labour)

DIY fix possible

Locate the external filling loop, which is a silver braided hose with one or two manual taps underneath the boiler.Open the tap(s) slowly to allow water into the system until the pressure gauge on the front panel reads between 1.0 and 1.5 bar.Close the tap(s) firmly and ensure no water is leaking from the connection.

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Ariston models that show the 1 08 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ariston 1 08 fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026