Low Information
P1, P2, P3, P1... on Worcester Bosch Greenstar 30HE

Your boiler is simply starting up and checking its internal systems as part of a normal restart process.

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

Please wait, initialisation in progress.

What causes this fault?

These codes appear because the boiler has been switched off at the wall or has recently experienced a power cut. The sequence signifies that the internal computer is running through a self-diagnostic check to ensure all sensors and components are working correctly before firing up. Once the countdown or sequence finishes, the boiler will return to its normal operating mode automatically.

DIY fix possible

Wait 5-10 minutes for the sequence to completeEnsure the gas and power supply are turned onCheck if the reset button was pressed accidentally

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