Emergency
GAS TAP STIFF on Chaffoteaux Corvec 28 OF BF

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description

i) Grease dried ii) Operating mechanism replaced incorrect

Engineer required

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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