Your boiler's computer or main control board has experienced a hardware error and cannot communicate with the rest of the system.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: –
What causes this fault?
This fault occurs when the boiler's internal computer experiences a critical communication failure or hardware crash. It is usually caused by an electrical component on the control board wearing out over time or a loose connection in the internal wiring preventing signals from traveling correctly.
DIY fix possible
Locate the electrical spur or plug for the boilerSwitch the power off for at least 30 secondsSwitch the power back on and press the 'Reset' button on the control panel
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 F67 — no call-out fees, no surprises.
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Ferroli Bluehelix Tech 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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