hi all just heard heating making noise like pump or fan running constant went to boiler to see one light flashing slow . manual says fault h burner lockout. i had this happen 2 years ago so i did the same pressed reset switch in for a second or more and it stoped flashing then i restarted heating and tried hot water all seems ok pressure is fine .it was serviced in october the boiler must be 5 years old these are the only faults since boiler was fitted . but what i want to know is what could have made it lockout???? should i get service man back to look? or wait see if it happens again ?