BoilerFaultCodesYour boiler has no power and the display is completely blank, meaning it cannot operate at all.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: ELECTRICAL SUPPLY FAULT or BLOWN FUSE
What causes this fault?
This fault occurs when the electrical circuit within the boiler is broken, preventing power from reaching the internal components. The most common reason is a blown fuse on the circuit board caused by a power surge, though it can also result from a complete failure of the main control board or an issue with the external power switch.
This issue is slightly more common during winter months when electrical storms or power grid fluctuations are more frequent, often leading to surges that blow internal fuses.
DIY fix possible
Check if the boiler's main power switch or fused spur is turned onCheck your home's consumer unit (fuse box) to see if a circuit breaker has trippedInspect the fuse in the boiler's external plug or wall switch
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 APPLIANCE INACTIVE NO ‘LED’s SHOWING — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Vokera Compact HE 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.
Affiliate links — we may earn a commission at no extra cost to you.