Fault 13 / 157 High

Worcester Bosch Fault 13 / 157 Fault Code

Also written as FAULT13157 — same fault.

The Worcester Bosch Fault 13 / 157 fault code means: your boiler's computer system has detected a change in its connected parts or settings and needs to be told how to recognize them again.. It appears on 1 Worcester Bosch model in our database.

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: System configuration: BUS device changed or replaced. Check system configuration for DHW or start automatic system configuration.

What causes the Worcester Bosch Fault 13 / 157 fault?

This fault occurs when the boiler's internal computer loses track of the sensors or external controls it is supposed to be talking to. It most commonly happens after a power cut, a software update, or if a new part has been installed but the boiler hasn't been properly introduced to it yet.

Typical repair cost £0-120 (including labour)

DIY fix possible

Locate the 'Reset' button on the front of the boiler control panel.Press and hold the 'Reset' button for approximately five seconds until the display changes.Wait for the boiler to complete its automatic configuration sequence, which may take several minutes.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Worcester Bosch models that show the Fault 13 / 157 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch Fault 13 / 157 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026