Recently we started noticing a hissing sound coming from the somewhere under the hood when we are charging our Niro at home on our Level 2 charger. It is also there when charging on a level 1 charger but not as loud. I don't remember hearing it when we first bought the car almost a year ago. I am wondering if this is normal and everyone hears it or if it is something that I should be worried about. Thoughts?
jmkroff
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