1075 W High

Worcester Bosch 1075 W Fault Code

Also written as 1075W — same fault.

The Worcester Bosch 1075 W fault code means: your boiler has detected an electrical fault with an internal temperature sensor, preventing the system from monitoring heat levels safely.. It appears on 11 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 temperature sensor at the heating block – temperature sensor may need replacing

What causes the Worcester Bosch 1075 W fault?

This fault occurs when the boiler's internal computer receives an incorrect electrical signal from the sensor that monitors the water temperature. This is usually caused by the sensor failing internally due to age or heat stress, or moisture getting into the electrical connections and causing a short circuit.

Typical repair cost £120-£190 (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 1075 W fault code

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

Source

Worcester Bosch 1075 W 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