Worcester Bosch · Greenstar 8000 Style Combi

2963 boiler fault code

Greenstar 8000 Style Combi

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What 2963 means

Heat exchanger sensor, or both flow and heat exchanger sensors, defective.

Gas Safe engineer: Use only the homeowner action in your product guide. If this fault or maintenance message remains or returns, contact Worcester Bosch or a Gas Safe registered engineer.

A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.

Safe check

Make a note of the displayed code. Do not remove the boiler casing or inspect internal gas, electrical or combustion components.

When to contact an engineer

Use only the homeowner action in your product guide. If this fault or maintenance message remains or returns, contact Worcester Bosch or a Gas Safe registered engineer.

Source and provenance