BoilerFaultCodesYour boiler has lost communication between its internal computer and parts like the thermostat due to an electrical connection issue.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: eBUS error – possible short circuit
What causes this fault?
This fault occurs when the boiler's internal communication system, known as the eBUS, suffers an electrical failure or short circuit. It is often caused by moisture getting into the wiring, a loose connection to the thermostat, or even two wires touching where they shouldn't. This prevents the control board from receiving instructions, causing the system to shut down for safety.
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 F.49 — 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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