E01-942 High

Worcester Bosch E01-942 Fault Code

Also written as E01942 — same fault.

The Worcester Bosch E01-942 fault code means: your boiler is struggling to clear exhaust fumes or draw in fresh air due to an issue with the pipe that goes through your wall to the outside.. 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: Telescopic Horizontal Flue Kit
Typical repair cost £150-300 (including labour)

Engineer required

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

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Worcester Bosch models that show the E01-942 fault code

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

Source

Worcester Bosch E01-942 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 7 July 2026