E01-944 Emergency

Worcester Bosch E01-944 Fault Code

Also written as E01944 — same fault.

The Worcester Bosch E01-944 fault code means: your boiler is struggling to clear exhaust gases due to an issue with the pipes that lead to the outside, which is preventing the system from running safely.. It appears on 1 Worcester Bosch model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Vertical 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 E01-944 fault code

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

Source

Worcester Bosch E01-944 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