What's That Noise ?

I was driving the 4Runner and turned the heater on. A loud noise came from the fan box. I thought  leaves had gotten caught in the fan housing and that they might blow out.

Two days later, I was once again driving the 4Runner. When I turned on the heat, the noise was 10 times worse. I thought I heard scratching. I told Jeff that I could not take the incredibly annoying sound and immediately called our mechanic.

The mechanic called the next morning to say that he had found a  TOWEL in the fan housing. There was also leaves and twigs. I am wondering if some creature tried to make a nest in the fan box ??

The fan now blows much stronger than it used to