BoilerFaultCodesYour boiler isn't broken; it has simply been left in a manual 'service mode' typically used by engineers, and just needs to be switched back to normal operation.
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: Not a fault code - Service mode selected to min, press service button to return to normal
What causes this fault?
This occurs because the 'service' button has been pressed, putting the boiler into a manual test mode used by engineers to check emissions. Instead of a hardware failure, the boiler is simply waiting for instructions to remain at a specific firing rate. Normal operation is paused until the boiler is told to exit this maintenance state.
DIY fix possible
Locate the service button (represented by a spanner icon) on the control panel.Press and hold the service button for a few seconds until the light stops pulsing.The light should return to a steady state or turn off, indicating the boiler is back in normal heating mode.
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A boiler cover plan would cover faults like 2 pulses / No light — no call-out fees, no surprises.
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Worcester Bosch Greenstar 24i Junior is discontinued — time for a new one?
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