- Jan 1, 1970
This could be OT, but I'm posting here to get replies with no
I have a relay in my boiler which buzzes/arcs I'm trying to diagnose
the fault, probably in my wiring. What conditions (eg shorting) would
cause a relay to switch on & off very rapidly (leading to a buzzing
noise) & arc?
Many possibles. Get a heating engineer in to look at it.