BoilerFaultCodesYour boiler has stopped working for safety reasons and requires a manual reset to attempt to restart.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: FLASHING. Boiler at lock-out
What causes this fault?
General lockout code 8 occurs when the boiler has failed to light several times and has shut down as a safety precaution. This is usually caused by a lack of spark to ignite the gas or a failure in the internal components that regulate gas flow or monitor the flame. If the boiler cannot confirm a successful ignition within its timed sequence, it stops to prevent unburned gas from building up.
DIY fix possible
Locate the reset button on the control panelPress and hold the reset button for several secondsWait to see if the boiler ignites; if it locks out again, call a Gas Safe engineer
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like 8 — no call-out fees, no surprises.
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Potterton Envoy is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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