BoilerFaultCodesYour boiler has detected an electronic communication error with the gas valve, meaning it cannot safely light the burner to provide heat or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fault with the gas valve command
What causes this fault?
This fault occurs when the boiler's main control board loses its electronic connection with the gas valve, preventing it from sending the signal to open. The most common reason is a loose or damaged connection in the internal wiring, though it can also be triggered by a complete electronic failure within the gas valve or the circuit board itself.
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 E15 — 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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