In message , gastec
writes

Please release me from this plumbing hell, its getting cold and I live
with 3 slightly concerned tenants! At least they can have a hot
shower.




Cheers
you have a diverter 3 port valve not a mid position valve....also you
have probably wired it wrong along with a probable air lock


You really are a mine of disinformation, aren't you

The danger is that someone will actually take you seriously.


--
geoff