BoilerFaultCodesYour boiler's internal computer has lost its configuration settings and no longer knows which model it is supposed to be operating.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Jumper tag fault
What causes this fault?
This fault occurs when the boiler's main control board loses the vital identity settings that tell it how to manage gas and water flow for your specific model. It is typically caused by a loose or failing physical jumper plug on the circuit board, or a sudden electrical surge that has scrambled the board's internal memory. Without this configuration, the boiler enters a safety mode because it no longer knows its own operating limits.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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