I noticed that I have an unusual "rumble" noise coming from the location of my ac blower motor when it kicks in full blast. When the air temp comes down a bit and the AC slows down or if I switch the ac off full blast under climate control, the noise goes away. I have never noticed this before and am wondering if it is my ac blower motor starting to fail. The noise is hard to explain. It is a rumble- or mechanical drowning. I think all I typically heard (while the engine was off) was the sound of the air coming through the vents. As I am in Florida, the ac is always on and if it is the blower motor, I am wondering if the constant activity has caused it to fail early.
There were posts about the cabin air blower failure due to wear or dirt build up. I would at least check the cabin air filter first. Good luck!
