yeh pump is correctly wired, and nothing strange on display of smartfit unit, when i turn on the power to the boiler i can hear the valve {think its a three way valve } open, upstairs when this happens i hear it whine twice {its only above the kitchen} and the overheat led comes on , the pump is not running but i dont know if its supposed to or not until the pilot is lit , and i have read mention of a fan in other threads, this is not running either but again i dont know if its supposed to until the pilot is lit?
just a recap incase i missed any important details
we have been in the house for a month and it was empty for a long time befor we moved in, i noticed that the hot water had been left on constant so put it back to auto
our house was nice and quiet at night until i tryed the heating after that i noticed the pump running constantly at night , and thought that the relay had fused in the smartfit unit near the tank but decided that it was the main pcb as switch live was permently live and the pump constantly energized, i guessed that the main pcb would control the switch live
after having the boiler powered down {aprox 30 mins} while i checked the relay in the smartfit unit
it failed to relight when i powered up the system
the next day i changed the pcb , but still the boiler will not light {old pcb was crispy} so needed to be changed
the boiler is a baxi solo 3 pf
with honywell smartfit room unit and pump/valve control unit
