How much does it cost to fix Worcester Bosch error code DHW light?

Typical repair cost for the Worcester Bosch DHW light fault is £120-250 including labour.

DHW light High

Worcester Bosch DHW light Fault Code

Q: What does the Worcester Bosch DHW light fault code mean?

Your boiler has automatically turned itself off because the hot water inside it has become dangerously hot.

Also written as DHWLIGHT — same fault.

The Worcester Bosch DHW light fault code means: your boiler has automatically turned itself off because the hot water inside it has become dangerously hot.. It appears on 2 Worcester Bosch models in our database.

Technical description: Over temperature shut-down if DHW temp water temperature above 85°C

Typical repair cost £120-250 (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 DHW light fault code

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

Source

Worcester Bosch DHW light 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