BoilerFaultCodesYour boiler's internal computer settings have been altered or are mismatched, which is preventing the system from operating correctly.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Jumper 1 changed – check position of jumper 1.
What causes this fault?
This fault occurs when the boiler's control board detects that a physical configuration pin, known as a jumper, has been moved or is missing. It acts as a safety mismatch because the internal computer no longer recognizes which specific model or power setting it should be operating at. The most common reason is a component failure on the main circuit board or an accidental change made during a recent repair or board replacement.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like E.02 – .19 — 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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