How much does it cost to fix boiler error code 109 R?

Typical repair cost for the boiler 109 R fault is £150-300 including labour.

109 R High

Boiler Fault Code 109 R

Also written as 109R — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 109 R appears across 1 boiler brand and 2 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 pump water around your heating system effectively, so it has shut down to protect itself from overheating. (As reported on Baxi EcoBlue System)

Pick your boiler brand for the 109 R fix

Baxi 109 R 2 models

Source

Information for the 109 R 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