High
Permanent Live 'On' on Potterton Ultra 2 30 DV

Your boiler is receiving a constant electrical signal telling it to run, which prevents it from properly starting or finishing its normal heating cycle.

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

Indicator lamp on the ignition board to aid electrical commissioning. Sequence when there is a call for heat.

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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