BoilerFaultCodesYour boiler's internal computer has developed a fault and can no longer control the heating system safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal fault (PCB)
What causes this fault?
This fault occurs when the boiler's main control board suffers a hardware failure or a critical memory error, preventing it from processing safety data. The most common reasons are electrical surges, moisture ingress on the circuitry, or simply the natural degradation of electrical components over many years of use.
This fault is slightly more common during winter or periods of heavy rain, as increased system demand and high humidity can put extra stress on aging electrical components.
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 E07 — no call-out fees, no surprises.
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