What I thought was a quick fix, turned into something more!! The leaves and debris from the cabin air filter fell into the heater blower fan when I removed the old filter! The debris caused a fan imbalance, resulting in a very loud fan noise - not good!
I used an endoscope camera to determine that the fan did contain leaves and set out to remove them. Ultimately, I had to remove the heater blower fan to get everything clean.
Miss Part 1? Check it out here! https://www.youtube.com/watch?v=HE-fEQwpXRk