Low
T1 on Worcester Bosch Heatslave

Your boiler is currently testing its ignition system to try and start 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.

Technical description

Ignition test – checking the igniter spark

DIY fix possible

Wait for the boiler to complete its automatic startup sequenceEnsure there is enough oil in your storage tankPress the reset button if the code remains on the screen for more than a few minutes

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