Hi edb49
Sorry for responding to this so late! I work for Glow-worm to help customers who are experiencing problems with their GW boilers or solar products.
Did you receive any help with this? I cant see any visible replies. Let me know and I'll do my best to look into this for you...
Hi
To be able to help I'd need to know a bit more information about your boiler.
Try calling our technical team here at Glow-worm on 01773 828300.
I hope it helps - let me know how you get on.
Thanks
Sally @ Glow-worm