thanks for the advice :D
dont worry,i wont be messing with any gas related items.
was hoping there might be a known fault with these boilers(other than pcb).
Boiler on light is illuminated but fan not running and "fan on" light not lighting.
fitted a new pcb as i have read its rubbish but fault still there.
have checked resistance of thermostat sensor and thats ok.
is there any commen faults relating to this problem?
please help as we have...