t2 Low

Worcester Bosch t2 Fault Code

Also written as T2 — same fault.

The Worcester Bosch t2 fault code means: your boiler is currently running an internal self-test on its air extraction fan to ensure it is working correctly, which is a normal automated process.. It appears on 5 Worcester Bosch models in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Fan test. Checking the basic fan operation. The fan will run for a maximum of 30 seconds. If the fan is OK then the fan will be heard running.

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 t2 fault code

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

Source

Worcester Bosch t2 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