Could be you have a frost stat on your boiler which will overide all controls when temp goes too low near boiler, this is to prevent pipes freezing/bursting.
Hi Steve,
have found a thermostat in garage where boiler is situated.
Have turned it down to the lowest which is 3 degrees. (was at 6 degrees)
Will let you know if that doesn't work.
Many thanks
Ian
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!