I'm getting a crackling sound from the circuit breaker (a 40A pair) serving my electric water heater when I switch it on. The crackling only happens when the temperature dial on the boiler is set to the point where it triggers the boiler to fire up.
I don't see any sparking at the circuit breaker.
However, I do see slight sparking at one of the wiring terminals on the boiler when I turn the temperature dial back to the point where it is no longer triggering the boiler, as shown in the red circle on this picture:
My multimeter shows I'm getting 210V where the boiler is wired to the house.
Does this seem like a problem with the circuit breaker, the boiler, or both?
I don't see any sparking at the circuit breaker.
However, I do see slight sparking at one of the wiring terminals on the boiler when I turn the temperature dial back to the point where it is no longer triggering the boiler, as shown in the red circle on this picture:
My multimeter shows I'm getting 210V where the boiler is wired to the house.
Does this seem like a problem with the circuit breaker, the boiler, or both?