Hot Water only comes on if Heating is on?

[Millsy 82]

The 2 port has to be installed for the unvented. You see it quite a bit. Personally I would of converted it to an a plan but you can do it this way.

You need to double check your wiring.

 

[rthandal]

Thanks for your response guys. Am I better off getting an electrician in or a Gas safe registered plumber? I’ll get them to install the Nest at the same time.

My electrician is in the house later today so he said he would have a look for me.

House is getting ceilings skimmed and repainted etc so would rather get this work done now.

 

[ShaunCorbs]

Depends on if the spark knows how to wire heating

 

[Millsy 82]

A lot of sparks now understand heating systems as a lot are doing more and more as they are getting more and more complicated I know loads of plumbers that wont go near the wiring.

Ask them to have a look whilst their there.

 

[Harvest Fields]

A decent heating engineer is what you need.