What does the Worcester Bosch 357 fault code mean?

Your boiler is simply running a routine 100-second self-cleaning cycle to remove trapped air from the system.

How much does it cost to fix Worcester Bosch error code 357?

Cost varies. Contact a Gas Safe registered engineer for a quote.

Worcester Bosch 357 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Appliance in air purge mode. Primary Heat Exchanger air venting program active - approximately 100 seconds.

Shared across the Greenstar range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

DIY fix possible

Wait for the 100-second countdown to complete automatically.Do not turn off or reset the boiler during this time.Check your system pressure once the display returns to normal.

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All 78 fault codes on the Greenstar i

Seeing a different code? Every code this model can display, in one place.

Your boiler is simply running a routine 100-second self-cleaning cycle to remove trapped air from the system.

What the manual says

DIY fix possible

Avoid the next call-out bill

All 78 fault codes on the Greenstar i

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