SIME FRIENDLY FORMAT 100 PCB PROBLEM

[franklone]

Hello,
It appears that my Sime Friendly format 100 boiler has a temperamental PCB. The boiler will not always ignite and often cuts out, however if I turn the power off and switch it back on sometimes it will fire up. This is mainly when set to Central heating, although sometimes on hot water. I can hear what appears to be arcing and strange noises from the PCB

The diaphragm was changed last month. .

Presuming it is the PCB Can anyone please advise where to obtain the cheapest replacement.
Part number SIME Code 0.503.602 its a blue box another number is 6210203
also on the box is CE PIN 0063AS4787
Many Thanks

 

[wheely]

hi there m8,my pcb went on my sime friendly 80 and have just purchased one from ebay brand new for £60,it is the same part number as yours was told by a corgi reg gas fitter that this was cheap so hear is the item number for ebay:Item number: 280126376873 hope this helps regards paul