Icon 40 heat only boiler, fault come on guys some one help me :)

[cdodds2004]

been to a ICON 40 heat only boiler and after alot of faffing around and testing after initially thinking the board was faulty i have narrowed it down to a certain fuse on the circuit board blowing,

now have changed the fuse twice and best way to describle the time the fuse blows is the pressure switch proves fan spins and then the boiler tries to ignite and the spark clicks 2-3 times then pops the fuse...........

any help apreciated tearing my hair out with this one guys! has any one seen the fault or no exactly what the fuse is protecting see photo as i took a pic of the board and fuse?

am i right in thinking this boiler was made by ideal ?? or not?

 

[stevetheplumber]

on combis its usually pump or fan id check them both

 

[cdodds2004]

its a heat only boiler and pump is fine, a little noisy but runs, and the fan is also seeminglessly running ok