For those (like me !!) who have difficulty in remembering how to interpret the Truma heating controls, this may assist !
http://www.motorhomefun.co.uk/forum/resources/truma-heating-controls-aide-memoire.107/
Hope it helps someone
http://www.motorhomefun.co.uk/forum/resources/truma-heating-controls-aide-memoire.107/
Hope it helps someone