Chevy Equinox blower fan

I replaced the “fan regulator” in my 2005 Chevy Equinox LT a few months ago.  Now, the blower fan isn’t working again.  Did I only replace a “symptom” of the real problem?  Is there a way I can find out if there are any recalls for this problem?  What can cause this $100 part to go out so soon/often?  Thanks in advance for any help.