Boiler keeps tripping out fuse.

[sparkz]

My neighbour boiler keeps tripping out the 3amp fuse. He had recently replaced the elcectronic board in the boiler, since then his been having trouble. Iv disconnected the live and neutral from the boiler and tested it and im getting voltage. Its only when i connect it back into the boiler terminals it blows the fuse. He told be he has not touch any of the wiring I would appreciate if you could give me some knowledge or guide me

cheers

 

[malcolmsanford]

Looks like there is a fault that most likely blew his original board, thinking that the fault was just the board but alas not so by the sound of things.

If this is a gas boiler I personally would leave well alone, though it's an electrical fault your not suppose to even take the front cover off a gas boiler unless your gas safe. If's electrical then if you don't have experience on the type of boiler then it's a disonnect everythnig and see what that does, but the more you play about and keep tripping fuses the chances are another PCB will be needed.

 

[Jimmy Boy]

Probably the pumps jammed usually takes the fuse out in the FCU
Good advise tho to leave well alone no point getting your --- sued