Low
P3 on Worcester Bosch Greenstar 30HE

Your boiler is simply performing a routine internal startup check and will be ready to use in a few moments.

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.

What the manual says

Manufacturer manual

Please wait, initialisation in progress.

Shared across the Greenstar Zwbr range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Wait for 5 minutes to see if the boiler begins normal operation automaticallyIf the code persists, switch the boiler off at the fused spurWait 30 seconds and switch the power back on to force a fresh system reset

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Related fault codes

P1View →P2View →P4View →

All 25 fault codes on the Greenstar 30HE

Seeing a different code? Every code this model can display, in one place.

0.05.29.3A1A5A7A8ACAdb1C1C6d3E2E9EAF0F7FAFCFdP1P1, P2, P3, P1...P2

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