How much does it cost to fix Ariston error code A98?

Typical repair cost for the Ariston A98 fault is £150-300 including labour.

A98 High

Ariston A98 Fault Code

Q: What does the Ariston A98 fault code mean?

Your boiler’s internal computer is experiencing a communication error, meaning it has lost its ability to regulate itself safely and has shut down to prevent damage.

The Ariston A98 fault code means: your boiler’s internal computer is experiencing a communication error, meaning it has lost its ability to regulate itself safely and has shut down to prevent damage.. It appears on 6 Ariston models in our database.

Technical description: Problem with the electronic monitoring

Typical repair cost £150-300 (including labour)

Engineer required

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

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Ariston models that show the A98 fault code

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

Clas One Repair: £150-300
Genus 27 Repair: £280-£450
Genus 30 Plus Repair: £150-350
Genus One 24 Repair: £150-350
Genus One 30 Repair: £150-350
Genus Premium Repair: £280-550

Source

Ariston A98 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