After experiencing the usual lockout problems, I replaced the PCB on my Suprima 40 with one of the style ones (part no. 5111506). The boiler has been fine for the last three years but is now playing up again.
Sometimes I get the flashing green light (temp satisfied) almost immediately after the boiler fires up when the water is still cold, other times the boiler indicates no external call for heat when there definately is.
I suspect that the PCB is faulty but am open to other suggestions.
If it does turn out to be the PCB, have I just been unlucky in having a fault develop, or are the new style PCB's as bad as the older ones?
Sometimes I get the flashing green light (temp satisfied) almost immediately after the boiler fires up when the water is still cold, other times the boiler indicates no external call for heat when there definately is.
I suspect that the PCB is faulty but am open to other suggestions.
If it does turn out to be the PCB, have I just been unlucky in having a fault develop, or are the new style PCB's as bad as the older ones?