Mike wrote:
My AC vent is making a whistling like noise.

Any ideas of the cause? My thought is that there are too many vents
closed (1500+ sf + the garage vents, and at least 4 vents are closed).

Could it be something else?

The compressor and stuff sounds normal, but where the cold air comes
out it's just very loud. Is it safe to leave running?

Shut it down and get your service company out.

It could be the blower wheel is coming apart and this could do some damage.
--
Moe Jones
HVAC Service Technician
Energy Equalizers Inc.
Houston, Texas
www.EnergyEqualizers.com