PD 52 transfer switch hum normal?
My pd52 hums pretty loud. How loud is too loud? Wrap in insulation?
Forum Discussion
I understand they are. The DC conversion is all internal. You might want to go to their website and submit a question. I've had to clean relays about every 3 years on our last 2 RVs. After a while you get good at it. It's dusty here out West.
