Thanks Phil,
I have checked both 'stats, I assumed they make on rise to advance the timer, Like the older Servis models, ( I was a Servis Field Engineer for 4 years in the 80,s) the one with 4 connections is O/c between both sets of terminals and th one with 3 connections is also o/c I am thinking it could be a programmer fault.....
Nick
Nick Aird, January 2007