How much does it cost to fix boiler error code GAS TAP STIFF?

Typical repair cost for the boiler GAS TAP STIFF fault is £120-220 including labour.

GAS TAP STIFF Emergency

Boiler Fault Code GAS TAP STIFF

Also written as GASTAPSTIFF — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code GAS TAP STIFF 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 The control knob for your gas supply has become stuck or seized, making it difficult or impossible to safely turn the boiler on or off. (As reported on Chaffoteaux Corvec 28 OF BF)

Pick your boiler brand for the GAS TAP STIFF fix

Chaffoteaux GAS TAP STIFF 1 model

Source

Information for the GAS TAP STIFF 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