worcester bosch 30 cdi reular boiler

[martin b]

Can anyone help with this one? i went out to the boiler and found that it was leaking water and the pcb fuse had blown, leak was from the auto air vent. replaced the fuse and it blew again straight away. unplugged the fan and it would power up. i replaced the fan, harness and the air vent. boiler powered up normally and ran for an hour. it then blew the fuse again. any ideas? i could umderstand it being a pcb problem ,but im confused as to why it would run for so long.

 

[lame plumber]

is everything dry now?

 

[Dotty]

Moving to the private forum.

 

[SafeGasInstall]

me think that the pcb aint dry or has corroded

 

[vern]

Unplug the transformer from PCB clean pins dry, then strip back of PCB around 8 screws get an hair dryer and blast full heat all around inc power button etc, unplug gas valve and do the same......fixes 8/10 times

 

[zeebeedee]

Did you use the right size quick blow fuse?