High Lockout
C7214 on Worcester Bosch GB162

Your boiler's air fan is failing to start up, which means the system cannot safely clear the combustion chamber to begin the heating process.

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

The fan does not run during the start phase

What causes this fault?

This fault occurs when the boiler's internal computer tries to spin up the fan to clear out old gases, but it receives no response or movement from the motor. The most common reason is that the fan motor has burnt out or seized, though it can also be caused by a communication failure between the main control board and the fan assembly.

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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