What the manual says
Manufacturer manualReset was pressed in error.
From this model's manual
Verified against the Worcester Bosch/Worcester Bosch 24 Rsf installation & service manual.
DIY fix possible
Wait for the boiler to return to normal operation on its own after a short period.If the code remains, turn the boiler off at the fused spur, wait one minute, and turn it back on.Check that the reset button is not physically stuck down.
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Related fault codes
All 18 fault codes on the Greenstar 30
Seeing a different code? Every code this model can display, in one place.