Thanks for the question.
Is the freezer cold enough and can you feel frost on the panel that the fan motor is mounted, also send me the model number please.
refrigerator is cold 42 degrees and a little frost
model number 795.77579600
The number 404a is the fan motor , you have to remove that back panel to see if the fan is hitting ice or its a noisy motor.
he pulled the fridge out and took the back panel off,the fan does not appear to be making the noise, we opened the door the noise stopped but the fan kept going