randal 102 clock problem?

[tartanheart]

hi
i have a baxi bermuda boiler behind kitchen wall which worked fine until suddenly tripping fuse on main elec. board. took plug for randal 102 clock out of socket and reset fuse in main board. when i tried plugging programmer back in it tripped again. pilot flame is still lit but cant use clock programmer without tripping main fuse thus no c/h or h/w. what may have caused this as it has worked ok up until now?
thanks for reading this + any advice appreciated.

 

[namsag]

Is it a gravity system (pump only for heating) if so put to HW only if it fires up ok then its the pump if not it is prob wiring burnt out by the boiler.

If it is fully pumped check the motorised valves for water dripping into them or leaking spindles/could still be pump or wiring burn`t out on fully pumped