Low
T1 on Worcester Bosch 26 CDi Xtra

Your boiler is currently running a self-diagnostic test to check if the ignition spark is working correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Ignition test – checking the igniter spark

DIY fix possible

Wait for the test to complete automaticallyIf the code persists, try resetting the boilerEnsure your gas supply is active

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