Hi,
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.

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

As far as I know the unit is about 8-10 years old as it was in the house
before we moved in.

Many Thanks for any guidance

Chris