BoilerFaultCodesWorcester Bosch Flashing light Fault Code
Also written as FLASHINGLIGHT — same fault.
The Worcester Bosch Flashing light fault code means: your boiler has failed to light the gas or cannot stay lit, meaning your heating and hot water have stopped working.. It appears on 2 Worcester Bosch models in our database.
Technical description: Flame failure
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hob.Ensure your credit is topped up if you have a pre-payment gas meter.Press the reset button on the boiler control panel for 5 seconds.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like Flashing light: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Worcester Bosch models that show the Flashing light fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Worcester Bosch Flashing light fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026