How much does it cost to fix boiler error code A37?

Typical repair cost for the boiler A37 fault is £280-450 including labour.

A37 High

Boiler Fault Code A37

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code A37 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has encountered a critical error and can no longer process instructions to run the system. (As reported on Ariston Egis 24 MFFI)

Pick your boiler brand for the A37 fix

Ariston A37 2 models

Source

Information for the A37 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