High
E133 on Potterton Suprima HE

Your boiler is failing to light the burner because it cannot detect a flame or is not receiving a consistent supply of gas.

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

Interruption Of Gas Supply or Flame Failure / gas supply has been interrupted, ignition has failed or the flame has not been detected

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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Related fault codes

E119View →E160View →

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