BoilerFaultCodesYour boiler's internal computer brain is confused by its own settings and needs to be checked and restarted.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Internal control box failure (parameters): check parameters and reset.
What causes this fault?
This fault occurs when the boiler's main control board loses its memory or fails to read the specific identity chip that tells it how to operate. This is usually caused by an electrical component failure on the circuit board or a loose connection to the parameter plug. Essentially, the boiler has forgotten its own identity and refuses to fire for safety reasons.
DIY fix possible
Locate the reset button on the control panelPress and hold the reset button for several secondsWait to see if the boiler restarts and the code clearsIf the code persists, contact a Gas Safe engineer to check technical parameters
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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