I have a problem with the above boiler,boiler randomly ignites although time clock is not calling for heat,micro switch from the zone valve is fine,I tested that this afternoon.There is only 1 zone valve on the system and thats on the C/H side,H/W has no control.Is this pointing to PCB failure ???
Potterton Supreme 60
- Thread starter locosaki1978
- Start date
DIYnot Local
Staff member
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