vaillant vcw 242 (4407713)

[timmy74]

any ideas here guys

boiler totally dead and blowing 3 amp fuses;

tested internal fuses all got continuity, checked fan and pump seemed ok for resistance and chb still blowing 3 amp fuses with these disconnected.

isolated external controls still doing the same

vaillant fault finding charts suggesting main circuit board

any ideas i havent had chance to phone manufacturers yet as they werent open saturdays

 

[timmy74]

thanks for the help folks

 

[Rob]

Im assuming you've tried disconnecting stuff, have you checked all wiring hrnesses?

 

[timmy74]

Im assuming you've tried disconnecting stuff, have you checked all wiring hrnesses?

havent tried disconnecting everything yet rob, its the one with the 4 boards