my greenstar highflow 440 boiler is showing an error code C1?

it will probably need a new fan

dave B
January 2018

You start by doing a Gooogle search for - say "greenstar highflow 440 error C1"

That will lead you to many, many results.

here is a typical.

Read all of it.

https://www.diynot.com/diy/threads/worcester-greenstar-28-he-plus-fault-code-c1.73828/

zdbhadha
December 2017