Low
Blue Light on Worcester Bosch Greenstar R29 40 HE

Your boiler is currently powered on and functioning normally under its basic settings.

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

Mains On/Off indicator/Diagnostic light

DIY fix possible

Check if the boiler is set to 'Eco' mode, which might change how the light pulsesConfirm your thermostat is asking for heat if the light is on but the radiators are coldNo action is usually required as a steady blue light indicates the power is on

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