1073 High

Worcester Bosch 1073 Fault Code

The Worcester Bosch 1073 fault code means: your boiler has detected a faulty electrical signal regarding how hot the water is inside the system and has stopped working to prevent damage.. It appears on 4 Worcester Bosch models 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: Short circuit of the flow temperature sensor

What causes the Worcester Bosch 1073 fault?

Sensor electrical fault

Typical repair cost £120-220 (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 1073 fault code

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

Source

Worcester Bosch 1073 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