I have a second hand GE Refrigerator that has a whistling sound coming from the freezer section. The sound is very like someone blowing across the top of a empty pop bottle. It usually slowly varies in pitch and volume and sometimes goes away completely.

It appears to come from the motor/fan assembly which is behind the automatic ice maker. I believe that this is just a recirculating fan for the freezer compartment.

When I move the tempo control to a warmer or off position (and the motor stops) the sound also stops and usually does not come back for 1-2 hours. If I stop the rotation of the blades manually it also stops.

It doesn't matter if the door open or closed - it is uneffected by door position.

Please help