Low
T1 on Worcester Bosch Junior 28i

Your boiler is currently testing its ability to create a spark to light the burner.

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 Junior 28i 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 boiler to finish its automatic test cycleEnsure your gas supply is active and turned on at the meterReset the boiler if the code remains on screen for more than a few minutes

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