Hi, my boiler stopped working the other day, im not a engineer but have good electrical skills. i found out the pump is not running so i went through the boiler wiring and discovered no power to the pump terminal or the "on" terminal. i checked the wiring diagram and found that the live for both these terminals is sent from the main live in, up to the overrun stat then back through to the pump and "on". i checked the live at the overrun stat and found that i have a perm live in but nothing out. I changed the overrun stat today but the boiler did not fire up? i checked the terminals again and have the same symptom. any ideas?
