Help with water heater

[toby_y@]

Hi all I have a electric water heater and for the last 2 days this box on the flow pipe has been buzzing is this a issue? The box has a lever that’s on auto.

 

[EvilDrPorkChop]

Think some images might help...

 

[Murdoch]

What make and model?

TBH any item that’s electrical and it starts making a noise is normally a sign to turn it off and seek advice. Could be a number of issues ....