How much does it cost to fix Ariston error code Red D L.E.D.?

Typical repair cost for the Ariston Red D L.E.D. fault is £100-250 including labour.

Red D L.E.D. High

Ariston Red D L.E.D. Fault Code

Q: What does the Ariston Red D L.E.D. fault code mean?

Your boiler has detected that water is not moving through it correctly, which has caused it to turn itself off to prevent overheating.

Also written as REDDLED — same fault.

The Ariston Red D L.E.D. fault code means: your boiler has detected that water is not moving through it correctly, which has caused it to turn itself off to prevent overheating.. It appears on 1 Ariston model in our database.

Technical description: Shutdown due to insufficient water circulation (lack of water in the boiler or water circulation failure in the primary heating circuit)

Typical repair cost £100-250 (including labour)

DIY fix possible

Check your boiler's pressure gauge and ensure it is between 1 and 1.5 barIf the pressure is below 1 bar, use the filling loop underneath the boiler to top up the system with water until it reaches the correct rangeCheck that all your radiator valves are fully open to allow water to circulate freely

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Ariston models that show the Red D L.E.D. fault code

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

Genus 27 Repair: £100-250

Source

Ariston Red D 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