Aren't intermittent faults the worst kind?
I'm not qualified to give advice Ifoldman, neither am I familiar with your particular boiler but having recently removed the RAM-2EMC22-02 ignition control unit from my Keston 50 boiler and dismantled it, I can tell you that there are no obvious moving parts inside. That said, the PCB contains two, small, plastic box type components that might be relays. Maybe these are sticking and need replacing? Or a dry joint on the PCB needs resoldering?
The last intermittent fault I had with my boiler was a faulty motor capacitor - the fan motor sometimes refused to start but you could hear it struggling to. Tapping the motor or giving the motor spindle a tweak would often get it moving. And it tended to stick when restarting after the boiler had been off a while (eg. not good in the mornings - bit like me).
Although the connectors to the RAM unit look OK, you could try removing them and reinstating - if you feel competent to do so.
Have you, or a qualified person, followed the boiler manuals fault finding flow chart - assuming there is one? It helped me identify a problem.
I was told by Keston, and others, that the RAM unit was no longer available but a suitable 'conversion kit' was (a misleading term I think - it's simply a non like-for-like replacement). I purchased it, found the supplied diagrams & wiring instructions easy to understand and fitted it in about 10 mins. Note that someone on this forum (different thread) had problems fitting the 'conversion kit' to a Keston 170 boiler. Check the link provided in an earlier posting by 'Agile' in this thread or search 'help with Keston 170 rubbish'. Looks like the person who had a problem fitting the conversion kit was replacing a later version of the RAM unit.
Good luck.
