How much does it cost to fix boiler error code 105?

Typical repair cost for the boiler 105 fault is £0 including labour.

105 Low

Boiler Fault Code 105

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 105 appears across 4 boiler brands and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is currently running an automatic air-bleeding cycle to remove bubbles from the system, which typically happens after a power cut or when first switched on. (As reported on Atag iS System)

Pick your boiler brand for the 105 fix

Atag 105 7 models ECA 105 1 model Ideal 105 1 model Sime 105 1 model

Source

Information for the 105 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