H7 Emergency

Worcester Bosch H7 Fault Code

The Worcester Bosch H7 fault code means: your boiler has detected that it is getting too hot and has automatically shut down to prevent damage or dangerous overheating.. It appears on 2 Worcester Bosch models 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: Terminals L - N not supported / Safety overheat thermostat fault
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 H7 fault code

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

Source

Worcester Bosch H7 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 31 August 2026