How much does it cost to fix Ariston error code 90 ❍, yellow ❍?

Typical repair cost for the Ariston 90 ❍, yellow ❍ fault is £90-180 including labour.

90 ❍, yellow ❍ High

Ariston 90 ❍, yellow ❍ Fault Code

Q: What does the Ariston 90 ❍, yellow ❍ fault code mean?

Your boiler has locked itself out because the reset button has been pressed too many times in a short period.

Also written as 90YELLOW — same fault.

The Ariston 90 ❍, yellow ❍ fault code means: your boiler has locked itself out because the reset button has been pressed too many times in a short period.. It appears on 1 Ariston model in our database.

Technical description: Too many (> 5) resets in 15 minutes

Typical repair cost £90-180 (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 90 ❍, yellow ❍ fault code

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

Clas One Repair: £90-180

Source

Ariston 90 ❍, yellow ❍ 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