What does the Ariston Limescale Build-up fault code mean?

Your boiler has detected that limescale is building up inside the part that heats your tap water, so it is limiting its own temperature to protect itself from further damage.

How much does it cost to fix Ariston error code Limescale Build-up?

Typical repair cost for the Ariston Limescale Build-up fault is £150-300 including labour.

Ariston Limescale Build-up Fault Code: What It Means & How to Fix It

Technical description

Indirect control (actuated through the regulation of the temperature in the primary heat exchanger) on the formation of limescale in the secondary heat exchanger; temperature is limited to 62°C.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register →

Related fault codes

1P1View →1P2View →1P3View →

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Your boiler has detected that limescale is building up inside the part that heats your tap water, so it is limiting its own temperature to protect itself from further damage.

Technical description

Engineer required

Related fault codes

Related guides you might find useful

Banging / kettling / whistling noise

No hot water but heating works

Radiators cold at the bottom

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