Last night we had a power failure that lasted about 2-3 hours or so. (The refrig was not opened during the failure). Our 2004 Whirlpool/Kenmore Energy Star 21.6 cu ft refrigerator started making a strange noise after the power was restored. The source of the noise was the fan in the freezer compartment (evaporator fan). By applying pressure to the plastic guard in front of the fan, the noise could be worsened or made better. I would try to stop the noise, only to have it return later. By this morning the noise was gone completely, and even trying to move the guard doesn't cause it to come back.
The noise sounded as if the fan blades were striking something. I don't think they were striking the plastic fan guard. Is it possible that some frost build up during the power failure caused this? Is there any risk of damage that could have occurred to the refrigerator? It seems be working perfectly at the moment. (2 more months of warranty coverage).
Thanks!