High
C2849 on Grant Vortex Blue

Your boiler has stopped working because its internal computer systems cannot communicate properly, preventing it from lighting the burner safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Fault C; Chassis CodeProblem is controller area network wiring bus and modules.fault two; MFG – Manufacturer SpecificFault eight; Ignition System Or Misfirefault four; BBV Sensor Circuit Low Voltagefault nine; Kick-Down Switch Failed Short

Engineer required

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

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