307 High

Ariston 307 Fault Code

The Ariston 307 fault code means: your boiler’s main control board has encountered an internal software or data error and cannot communicate correctly.. It appears on 1 Ariston model in our database.

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.

Technical description: All Boilers
Typical repair cost £250-450 (including labour)

DIY fix possible

Locate the power switch or fused spur for the boilerTurn the power off, wait for 60 seconds, and turn it back onPress the Reset button on the boiler front panel once the display restarts

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

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Ariston models that show the 307 fault code

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

Source

Ariston 307 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