How much does it cost to fix Ariston error code A36?

Typical repair cost for the Ariston A36 fault is £150-300 including labour.

A36 High

Ariston A36 Fault Code

Q: What does the Ariston A36 fault code mean?

Your boiler has detected that the exhaust gases leaving the unit are dangerously hot, so it has safely shut itself down to prevent damage.

The Ariston A36 fault code means: your boiler has detected that the exhaust gases leaving the unit are dangerously hot, so it has safely shut itself down to prevent damage.. It appears on 2 Ariston models in our database.

Technical description: Flue pipe too high temperature

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 A36 fault code

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

Bravo 24 MFFI Repair: £150-300
Egis 24 MFFI Repair: £150-450

Source

Ariston A36 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