How much does it cost to fix boiler error code 0E99?

Typical repair cost for the boiler 0E99 fault is £120-250 including labour.

0E99 High

Boiler Fault Code 0E99

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 0E99 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to talk to another heating unit connected to it, which is preventing the system from operating correctly. (As reported on Alpha Pro Tec Plus)

Pick your boiler brand for the 0E99 fix

Alpha 0E99 3 models

Source

Information for the 0E99 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