BoilerFaultCodesYour boiler is simply going through its normal startup and self-test sequence after being turned on or reset.
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?
This sequence occurs when the boiler's internal computer begins its startup and safety checks after the power has been switched on or the reset button pressed. It is not a fault, but rather the boiler confirming all internal components are communicating correctly before it begins the ignition process. Think of it like a computer booting up its operating system before it is ready for use.
DIY fix possible
Wait for approximately 30 to 60 seconds for the sequence to finishEnsure the boiler power is left switched onIf the code persists for more than 5 minutes, try a single reset
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like P1, P2, P3, P1... — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Worcester Bosch Greenstar 25HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.