Thanks Tom1981 and OwainDIYer for your quick replies.
Really useful to me as I have just started doing DIY first time in our new home.
If I buy Channelplus H21XL and replace it with alteration of wire, I think that will fix my issue?
Thanks
Hi all,
I am totally new to this forum. But I am hoping that I will surely get an answer to my questions. I just bought the house and it has
Potterton Boiler system
Switchmaster 805 control
Teddington thermostate
Boiler system works manually and via thermostat but dialer on the 805...