halstead best 50 - not firing up!

[paul67bug]

hi can anyone help?

ive got a halstead best 50 boiler, about 5 years old, working fine until recently...

found out it had blown the 2amp glass fuse in the boiler, replaced it, fine for a few days and then blew again, told could be the programmer so renewed this, ok again for a week then it would not fire up, fuse still ok

any advice?????

cheers

 

[gas4you]

Is this fuse on the main pcb?

Could be the fan intermittently faulting, or perhaps the pump.

Don't think there is a fuse in the ignition pcb

 

[paul67bug]

hi dave

no its the 2amp fast blow fuse from the mains into the aquastat control. but this fuse is ok now, it hasnt blown again, so havent got a clue

any ideas????
cheers

 

[kawasakiracer]

where did you find the fuse i think mines gone and cant see it for looking probably right in front of me

 

[Boilerman2]

is either the "LOCKOUT" or "OVERHEAT LOCKOUT" lamp lit?
if not suspect external fault i.e not in the boiler case - check motorised valve/s

 

[kawasakiracer]

Hi thanks have changed the pump because it blow a couple of fuses but still no power to pump from wiring centre also changed PCB in Dec 3 port valve seems to be moving and doing its thing have power at boiler power on purple wire in pcb
Have no light on overheat