Glow worm EP40F

[EP40F]

I have just moved into a house with a Glow worm EP40F boiler and it does not work. You switch on the boiler from the timer, the fan comes on and then nothing. I have replaced the PCB and the Air pressure switch but this made no difference. Any advice on what the problem could be?

cheers

 

[gas4you]

I have just moved into a house with a Glow worm EP40F boiler and it does not work. You switch on the boiler from the timer, the fan comes on and then nothing. I have replaced the PCB and the Air pressure switch but this made no difference. Any advice on what the problem could be?

cheers

Try taking the fan off and cleaning the venturi. Also check sensing pipes for blockages/splits. Is this the model that has that little restrictor in the sensing pipe, if so check this is clear.

If all this proves ok have you taken voltage reading at gas valve or gas valve connection on pcb?