Bingo
We do have a little box attached to the cylinder, looks like this: http://www.draytoncontrols.co.uk/HTS3CylinderThermostats.aspx
Does it not look like it's wired in?
We do have a little box attached to the cylinder, looks like this: http://www.draytoncontrols.co.uk/HTS3CylinderThermostats.aspx
Does it not look like it's wired in?