How much does it cost to fix boiler error code A07?

Typical repair cost for the boiler A07 fault is £150-550 including labour.

A07 Emergency

Boiler Fault Code A07

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code A07 appears across 4 boiler brands and 18 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down because the exhaust fumes have become dangerously hot, which could indicate a blockage or a heat exchanger problem. (As reported on Ferroli Bluehelix Tech)

Pick your boiler brand for the A07 fix

Ariston A07 13 models Ferroli A07 3 models Potterton A07 1 model Vokera A07 1 model

Source

Information for the A07 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026