Glow worm boiler help.....

9 Dec 2010
Reaction score
United Kingdom
Got glow worm boiler flexicom cx24 fitted in Feb 2010.
Keeps going off.

Fault F4
Hit reset button few times and fault changes to F6.
Has flashed F1 a few times too whilst trying to reset it.....
Sometimes comes back on, but sometimes I need to leave it a few days then it'll come on. However, it's not coming on at all now.
Also, there's a rumbling within the boiler (like it's gonna explode), so i switched it off. Also, sounds like a kettle boiling, then it cuts out.....

Boiler repair man came to fix and stripped it back on Monday, got it working, but by Tuesday it has gone again.

He found grit and oil in the condensate white box thing (sorry, not v technical), and he didn't know what it was coming from.

How do I get this fixed? It's going off every day, and this time I can't get it back on....

HELP!!! Any ideas whats wrong with it? It is only a 10 months old!!!!
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