BoilerFaultCodesYour boiler is currently stuck in its startup or programming sequence and is not yet ready to provide heat or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: PCB Power up / Programming Mode
What causes this fault?
This fault occurs when the boiler's main internal computer loses its configuration or gets stuck during its initial boot sequence. The most common reason is a power surge or a failing printed circuit board that can no longer hold its basic programming instructions.
DIY fix possible
Wait up to 15 minutes for the programming cycle to finish automaticallyTurn the boiler power off at the fused spur switch, wait 30 seconds, and turn it back onPress and hold the 'Reset' button for 3 seconds
Find a Gas Safe engineer
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A boiler cover plan would cover faults like uP — 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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