How much does it cost to fix Ariston error code NO WATER L.E.D.?

Typical repair cost for the Ariston NO WATER L.E.D. fault is £80-150 including labour.

NO WATER L.E.D. High

Ariston NO WATER L.E.D. Fault Code

Q: What does the Ariston NO WATER L.E.D. fault code mean?

Your boiler has stopped working because it cannot detect enough water pressure circulating inside the system.

Also written as NOWATERLED — same fault.

The Ariston NO WATER L.E.D. fault code means: your boiler has stopped working because it cannot detect enough water pressure circulating inside the system.. It appears on 3 Ariston models in our database.

Technical description: Illuminates within 40 seconds if there is air in the system, main circuit flow switch operation issues, or low water pressure (return to 1 bar).

Typical repair cost £80-150 (including labour)

DIY fix possible

Check your boiler's internal pressure gauge located on the front panel.If the needle is below 1 bar, locate the filling loop (usually a silver braided hose under the boiler).Open the filling loop valves slowly to let mains water in until the needle reaches 1.5 bar, then close the valves tightly.

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Ariston models that show the NO WATER L.E.D. fault code

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

Source

Ariston NO WATER L.E.D. 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