GE CFE29TSDCSS refrigerator fan? noise

[Catherine57]

The refrigerator is nearly 2 years old.  Recently it has gotten very noisy, like a fan when the bearings start to go.  This particular fan-like noise stops when you open the refrigerator door.  It does not stop when you open the freezer drawer (bottom).

This weekend we opened it up from the front -- removed the panel on the inside back wall of the refrigerator compartment and accessed that fan.  It was fine.  Also, it does not shut off when you open the door.

I can see the fan in the back of the freezer compartment.  Is it worth trying to check it?  1) the sound does not stop when I open the freezer door.  2) It looks like it's running when the sound stops.

I know there must be another fan in the back with the compressor, but that surely doesn't cut off when the refrigerator door opens.   If I just knew where the fan(s) is/are that turn off when the refrigerator door opens it would help a lot.   

Thanks for any help or tips.

Catherine