How much does it cost to fix boiler error code EE 9944?

Typical repair cost for the boiler EE 9944 fault is £250-450 including labour.

EE 9944 High

Boiler Fault Code EE 9944

Also written as EE9944 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code EE 9944 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's main control computer is experiencing a major internal communication error and cannot operate safely. (As reported on Ariston E-Combi One 30)

Pick your boiler brand for the EE 9944 fix

Ariston EE 9944 4 models

Source

Information for the EE 9944 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