Chaffoteaux GAS CONTROL TAP STIFF (USERS) Fault Code
Also written as GASCONTROLTAPSTIFFUSERS — same fault.
The Chaffoteaux GAS CONTROL TAP STIFF (USERS) fault code means: the dial you use to turn your boiler's gas supply on or off is physically jammed, making it difficult or impossible to operate safely.. It appears on 2 Chaffoteaux models in our database.
Technical description: i) Grease dried, ii) Operating mechanism replaced incorrectly
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Chaffoteaux models that show the GAS CONTROL TAP STIFF (USERS) fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Chaffoteaux GAS CONTROL TAP STIFF (USERS) fault code information on this page is sourced and cross-checked against the official Chaffoteaux service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026