2008 Honda Accord The blower motor make noise!

I hit the curb last weekend and the car was minor damage, the dealer adjust the wheel alignment, it was the front right wheel. Anyway, after that incident I started notied that the blower motor fan make noise every time I turn the fan on but the dealer said that it's normal, I even bring my car to couple different dealer but all of them said my car is fine. I swear I can hear the noise every time I turn on the fan! Is there anyway I can fix this myself? Like changing the fan? It's sound like the fan blade is broke or something like that.