Thanks a lot Tony, that make lots of sence. I think it is a S-Plan
boiler (Vailant 112E), and it does has 2 MV's. I will try to follow
through the circuit to see it I can find the problem. I assume if the
MV's are both still working, then the most likely problem is the
programmer ? Although I can't believe so many things went wrong at
once.
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