How much does it cost to fix boiler error code 2 AT?

Typical repair cost for the boiler 2 AT fault is £120-220 including labour.

2 AT High

Boiler Fault Code 2 AT

Also written as 2AT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

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

Most common meaning Your boiler has stopped working because a small internal safety fuse on the control board has blown, preventing the system from igniting. (As reported on Baxi Barcelona)

Pick your boiler brand for the 2 AT fix

Baxi 2 AT 1 model

Source

Information for the 2 AT 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 7 July 2026