How much does it cost to fix boiler error code 9.E?

Typical repair cost for the boiler 9.E fault is £120-£250 including labour.

9.E High

Boiler Fault Code 9.E

Also written as 9E — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 9.E 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 is struggling to detect when you turn on a hot tap, meaning you might have inconsistent or no hot water. (As reported on Worcester Bosch Greenstar CDi Compact)

Pick your boiler brand for the 9.E fix

Worcester Bosch 9.E 1 model

Source

Information for the 9.E 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