I have one and when new never buzzed. But lately it can be a buzzing quite a bit. It will buzz when the circuit goes under load, and the voltage supply to the relay falls and my improve a little as the load keeps running. Or it may just buzz all the time, seems very random. The buzzing noise intensity varies tremendously, from obnoxiously loud to almost silent.
So can it be cleaned, greased? Is where the arm comes down onto the coil rusty or dirty? It might, if I whack at it, stop buzzing.
So can it be cleaned, greased? Is where the arm comes down onto the coil rusty or dirty? It might, if I whack at it, stop buzzing.