Glow worm boiler fault code

9 Dec 2006
Reaction score
United Kingdom
Could anyone enlighten me on what the code F5 means on a british gas glow worm 330 boiler means ? Thanks
Sponsored Links
Thanks, iv'e turned the boiler off and reset it but it comes up with that code. i've drained down the system to fit a new rad and went through the normal proceeders of bleeding all the rads, it fired up a couple of times but now comes up with that code. Am i missing something??
Sponsored Links
Sunday morning & Freezing cold with no heating.
What do you do? I'll tell you, come on this site and get help from you lot and correct BOB is my uncle............Job Done!

Thank you so much for you help, very much appreciated.

Can anyone help on how i fix or what the f5 code means on a glow worm 30 si boiler please please please :cry:
Scatmanjohn you are the man! After experiencing the F5 fault I had a good look on the net and you were the only one with an answer, if I'd of taken earlier advise I'd just of got ripped off by a plumber, thanks for solving a headache and warming up me house again.
Dose any one know what an F9 fault is on a Glow Worm combi Boiler? and how to fix it would be nice.

two questions from a newbie:

1. anyone know what the error code F4 indicates on the (Scottish Gas) Glowworm 330 boiler?

2. any pointers to an online manual for this boiler.

we have just noticed that the CH did not come on this evening and hence the interest in the F4.

f4 is an ignition fault iirc.

off topic, whats happened to scatman? dont remember him posting for ages.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links