Grinding noise from under hood, when air conditioner is on

What is your question?

When I turn the air conditioner on, there's a strange grinding, noise from under the hood. It's pretty loud when the gas engine isn't on. Sounds almost like a small fan that's got a piece of plastic stuck in it & the blades are hitting as they pass by. Is this normal for a hybrid?

How long has your 2013 Hyundai Sonata had this problem?

Just noticed it today