VOKERA 20-80 RS WILL NOT FIRE????

[robhat]

I have a vokera 20/80 RS combi. We ahve just had a power cut and now the boiler wont fire. HELP?
The pilot light is lit, the pressure is ok (1.5bar) and the pump is running (i think). the boiler sounds like it is doing all the right things just not firing up on either heating or HW demand - HELP! thanks in advance

 

[compheat]

Its a long time since i've worked on one but it could be the internal fuses on PCB, is the fan coming on at all? was the boiler on when you had the power cut?

 

[robhat]

the pcb looks ok although i cant see any obvious looking fuses? there is a clear plastic housing on the pcb which contains a cylinder and small copper bars? is this the fuse?
The fan is definately not running (i have checked outside and it is normally on continually??)

The diverter valve pin moves ok as does the other HW/CH pin?

Yes the boiler was on timer and running when the power cut?

any ideas?

cheers.