How much does it cost to fix boiler error code CFL90?

Typical repair cost for the boiler CFL90 fault is £150-300 including labour.

CFL90 Emergency

Boiler Fault Code CFL90

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code CFL90 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 failed to ignite because the flue system is obstructed or not drawing air correctly, meaning it is currently unsafe to operate. (As reported on Potterton Kingfisher MF RSL/CFL)

Pick your boiler brand for the CFL90 fix

Potterton CFL90 1 model

Source

Information for the CFL90 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