Before replacing the compressor mountings,
unplug the refrigerator to avoid an electrical shock hazard.
The compressor sits on rubber mountings.
Those rubber mountings are designed to absorb vibration from
the compressor. As the mountings age, they can become hard
or disintegrate. When this happens, the compressor vibration
is transmitted to the refrigerator and it can be noisy. Replacing
the mountings is easy to do.
The compressor is located in the rear. It
may be necessary to remove an access panel to get to the compressor.
Locate the compressor and remove the screw
or retaining clip (labeled "A" below) of just one
of the compressor mounts (labeled "B"). Using a
pry bar, lift up the compressor enough to slip out the rubber
mount and slip in a replacement. Replace and tighten the compressor
mount.
Repeat this step for each of the compressor
mounts.