hi! i have a potterton combi 100 which is always breaking down . In the last 7 years 3 pumps ,2 circit boards,one temp sensor,i guage> any one else had any problems it has a fault at least every year and bg thank goodness service it! does any one else have problems with pottertons or other makes or is it just a one off,i am not saying the make is poor as in the past they have been good! thankyou!