Boiler keeps blowing fuse

[stulew]

No sorry Ollski, that was an earlier mistake which I thought I had rectified, because I had not seen the system and was just going on what someone had said... It is wired correctly to a fused 3A spur.

 

[ChrisR]

Hmmm consumer units don't have 3Amp fuses....

 

[ollski]

So the 3a fuse at the fused spur is fine?. i've never seen a 3 amp mcb either, are you just reiring an old fuse with 3a fuse wire?, and finally is the heating system the only draw on the fuse at the board?

 

[stulew]

Ollski... Sorry mate, I thought that i had already corrected that part of my original post. There is a fused 3A spur and this is correctly wired, that is the fuse that is blowing.