BoilerFaultCodesYour boiler has detected a general fault that has caused it to stop working for safety reasons.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fault condition
What causes this fault?
This fault occurs when the boiler's internal computer detects a logic error or a failure in the electrical circuit that prevents safe operation. The most common reason is a communication breakdown between the electronic control board and key components like the fan or the ignition probes, leading the system to shut down to prevent damage. In many cases, it signifies that a vital part has either worn out or suffered an electrical spike.
DIY fix possible
Locate the Reset button on the front control panelPress and hold the Reset button for approximately five secondsWait for the indicator light to stop flashing and see if the boiler ignites
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Indicator light flashes slow/fast (uneven interval) — no call-out fees, no surprises.
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Worcester Bosch Greenstar 24i Junior is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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