Kenmore 30 Owner's Manual page 23

BeforeYou Call for Service
Normal Operating Sounds
These sounds are normal and do not indicate a need for service.
The new high efficiency compressor runs faster and will have a higher
pitch hum or pulsating sound while operating.
Defrost timer and refrigerator control click on and off,
The fan circulating air inside the freezer which keeps the
temperatures throughout.
Water dropping on the defrost heater causing a
sizzling, hissing or' popping sound during the defrost cycle.,
The flow of refi'igerant through the fieezer cooling
coil sounds like boiling water or a gurgling noise.
Cracking o_ popping of cooling coils caused by expansion
and contraction during defrost arid refrigeration following defrost.
Water dripping as it melts from the evaporator _--._.._
and flows to the drain pan during the defrost cycle.
lcemaker i_
The icemaker water valve will buzz when the icemaker fills
with water. If: the feeler arm is in the ON (down) position it will buzz
has not yet been hooked up to water,, Keeping the feeler arm in the ON (down)
position before it is hooked up to water can damage the icemaker. To prevent this,
raise the feeler arm to the STOP (up) position. This wil! stop the buzzing.
The sound of cubes dropping into the bin and water running in pipes as
icemaker refills.
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