High
A01 on Ariston Ecosystem 27 RFFI

Your boiler has stopped working because it is not receiving a reliable supply of gas to create a flame.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

The electronic system will shutdown the boiler, because the supply of gas has been cut off.

From this model's manual
Verified against the Ariston Micro Condens System installation & service manual, page 27.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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