How much does it cost to fix boiler error code 101?

Typical repair cost for the boiler 101 fault is £120-350 including labour.

101 High

Boiler Fault Code 101

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 101 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 it has detected an overheating issue within the main heat exchanger. (As reported on Ariston Alteas One)

Pick your boiler brand for the 101 fix

Ariston 101 1 model

Source

Information for the 101 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