GE Profile PGCS1NFZSS Owner's Manual And Installation Instructions page 33

Newer refrigerators sound different from older refrigerators.
Modern refrigerators have more features and use newer technology.
CLICKS, POPS,
CRACKS and SNAPS
Troubleshooting Tips
Save time and money! Review the charts on the following
pages first and you may not need to call for service.
Refrigerator in defrost cycle.
Control in
Refrigerator is unplugged.
The fuse is blown/circuit
breaker is tripped.
Leveling legs need adjusting.
position.
Level the Refrigerator.
WATER SOUNDS
For additional information on normal
icemaker operating sounds, see the
section.