my boiler wont stop firing?

Hi do you know the make or type of oil boiler that you have?

rob
November 2008

Does it have a frost 'stat? If so it will override any programmer setting because it is trying to prevent your system from freezing. Check its setting 2-3 oC. How cold is it where you are?
If everything checks out ok, then start suspecting a jammed switch in the programmer

Cledlyn
November 2008