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.

What the manual says

Manufacturer manual

Ignition test – checking the igniter spark

From this model's manual
Verified against the Worcester Bosch 26 Cdi Xtra installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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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