Sounds like the fan for rear air/heater. usually found behind the inner cover.
its your squirl cage inside of your blower motor. guaranteed. happened to me twice
Could be bad ball joints.
When there are loose parts in the fan that runs the heater system, there will be many instances of noise and vibration. A technician should dismantle the system and fix it.
you may have leaves in the fan
If it's a grinding or howling sound, the heater blower motor bearing has probably dried up and ready to fail.
check a/c compressor and belt.
A high-pitched noise from your heater could be caused by issues such as a malfunctioning fan or motor, a clogged air filter, or loose components. It is important to have a professional inspect and repair the heater to prevent further damage.
Your CV joints could be going bad. Check to see if your CV boots are cut or opened to the elements. If so, your joints may need to be replaced. Before your spend money have a mechanic verify your complaint.
A bad starter might make a noise. The starter could also go bad with no noise or warning. However if the starter is making noise then there is a problem that could cause failure at any time
Several things could be making the Lumina growl. Check the belts and pulleys on the front of the engine. Check the engine mounts as well. Either of these areas can cause the problem of the growling noise.
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
was there something on your dash that fell in the vent, a bad fan will make noise all the time.