Low
357 on Worcester Bosch 1000

Your boiler is currently running a brief automatic test to clear any lingering gases from the internal system before it attempts to fire up again.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Ventilation program

What causes this fault?

Ventilation operation mode

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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