The man who came out and checked over the system was knowledgeable and worked continuously on addressing the situation. The noise problem which sound like a deep undertone when the AC and fan are running, but when the AC kicks off and just the fan is running, the air flowing is normal. After the first company came out to service this problem he didn't accomplish the task by replacing the motor.
I am at my Witts end over this problem. I don't know what the cause is but am sure the situation remains and the problem still exists.