- Joined
- 10 Oct 2011
- Messages
- 16,396
- Reaction score
- 4,042
- Country
Call for CH goes into terminal 7 along with call for HW , term 7 is HW off (NC) which would be the reason for the permanent link across 3-7 , seems to me the earth core into term 8 could be perm live? , can't really see what other purpose it is serving. , unless of course it is used to power the grey on a mid position valve. , OP needs to post what controls he has.
Rip it out and start again.
Rip it out and start again.