How much does it cost to fix boiler error code Fan does not run at max speed?

Typical repair cost for the boiler Fan does not run at max speed fault is £120-250 including labour.

Fan does not run at max speed High

Boiler Fault Code Fan does not run at max speed

Also written as FANDOESNOTRUNATMAXSPEED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Fan does not run at max speed 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 detected that it has become too hot and has automatically shut down to prevent damage, causing it to stop heating your home and water. (As reported on Baxi Combi 80e)

Pick your boiler brand for the Fan does not run at max speed fix

Baxi Fan does not run at max speed 1 model

Source

Information for the Fan does not run at max speed 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