Is it difficult to replace a timer switch in a heat line condensing boiler? any help appreciated .

Thank you.

barry, August 2015

Its easy if you are DIY and right tools switch off boiler from main ,you need tok screw driver to undo long stud which holds control panel from bottom ,main board will drop ,un do four screw from timer ,remove three wire ,make note which wire goes where or take photo just fit new one

ltd, August 2015