BoilerFaultCodesYour boiler has lost power or is suffering from a complete electronic failure, meaning the control screen is unresponsive and the heating will not operate.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Blank Display
What causes this fault?
This fault occurs when the boiler's internal computer brain loses its electrical supply or suffers a terminal hardware failure. It is typically caused by a blown fuse on the control board or a malfunction within the main circuit board that prevents power from reaching the screen. Because the display is dark and the controls are unresponsive, the system cannot process any requests for heating.
This fault is often seen following summer storms or winter power surges, as electrical spikes can easily blow the sensitive fuses or damage the circuit board.
DIY fix possible
Check if your home's main fuse box has tripped a circuit breaker.Ensure the boiler's isolation switch (usually a white fused spur near the unit) is turned on.Check if other appliances in the house are working to rule out a general power cut.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 4.16 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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