BoilerFaultCodesYour boiler's internal computer has lost communication with one of its key control modules, meaning it cannot save or follow its programmed settings.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Unable to save parameter settings: BUS device is configured but not available at present.
What causes this fault?
This fault occurs when the boiler's main control board loses the electronic link to an internal or external accessory it expects to find. It is usually caused by a loose connection in the wiring harness or a critical failure of the internal circuit board that stores your heating settings.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like Fault 29 / 202 — 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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