blower motor makes noise when I start or stop the engine but it still blows hot and cold air

What is your question?

I am hearing a moderate noise most of the time (sounds like fan blades hitting the side of the housing), and sometimes it is loud. This only lasts for a minute or so and then stops. It happens when I turn the engine on or off, or when I change a setting on the A/C panel. I have a 2013 Chevrolet Impala.

What makes this problem better or worse?

The problem stops after a minute of running or after being turned off.

How long has your 2013 Chevrolet Impala had this problem?

A few months