High
B. (5) on Potterton Kingfisher 2

Your boiler's pilot light has gone out and refuses to stay lit, meaning the system cannot ignite to provide heat or hot water.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Main burner fails to light and pilot is extinguished when pressure on the control knob is released - Failure of thermocouple, power unit or latching mechanism.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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