I have just moved to a house with Horstmann H425 control which is i want to change to Horstmann H27 XL Series 2 Channel.Plus.
I want to know if anybody has done it before or any advice on how to do it.I have just read on the internet that the backplate and the wiring is the same.
Thanks
Johnny
I want to know if anybody has done it before or any advice on how to do it.I have just read on the internet that the backplate and the wiring is the same.
Thanks
Johnny