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worcester greenstar 30Ri compact blue pulsing light?

I have a sealed /unvented cyl system, my boiler has a pulsing blue light,( not constantly flashing. ive tried the reset button to no avail
any ideas

R Knight
November 2017
Worcester GreenstarHeating, Home Heating SystemsWorcester Greenstar Blue
Yes. Read the manual!

https://www.worcester-bosch.co.uk/support/literature/download/6720813339

7 Faultfinding, page 12, top of page.

bzxc
November 2017
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