BoilerFaultCodesYour boiler's main control board has encountered an internal electronic error and can no longer manage the heating process safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: PCB fault.
What causes this fault?
This fault occurs when the boiler's internal computer experiences a critical communication failure or an electrical component on the board burns out. It is often caused by long-term wear and tear, power surges, or moisture ingress affecting the delicate circuitry. Because the board can no longer monitor safety sensors reliably, the boiler shuts down as a protective measure.
This issue often comes to light during the first cold spell of autumn when the boiler is suddenly under high demand after being idle all summer.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like 05 — no call-out fees, no surprises.
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Vokera Mynute 28E / 35E 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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