Low
Switched Live 'On' on Potterton Ultra 2 50 DV

Your boiler is correctly receiving a signal from your thermostat to turn on and is currently in the active process of starting up.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

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

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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