In article ,
Chris wrote:
I have a Drayton Central Heating control unit ( i.e. controlling the
times the heating and water come on ) which keeps blowing the 3 amp fuse
protecting it.

You need to be certain it is that and not something it feeds or the wiring
to those. My guess is it's far more likely to be the latter options. If it
were a fault in the unit itself it would likely have stopped working by
now. Basically it's just two switches operated by its electronics.

Is it a case of getting a new unit ( and how complicated is that to fit)
or is there any likely chance of repair.

If it were the controller at fault, given the lowish price, a pro repair
is unlikely to be viable.

--
*It is easier to get older than it is to get wiser.

Dave Plowman London SW
To e-mail, change noise into sound.