• The fan circulating air inside the interior of your unit to maintain the
temperature you have selected.
• Boiling water, gurgling sounds or slight vibrations that are the result of
the refrigerant circulating through the cooling coils.
• Sizzling or popping sounds resulting from frost melting during the
defrost cycle and dripping on the defrost heater.
• The sound of dripping water as ice melts from the evaporator and flows
into the drip pan during the defrost cycle.
• Cracking or popping sound caused by the expansion and/or
contraction of the cooling coils during the defrost cycle.
• The thermostat control will click when it cycles on and off.
Normal Operating Sounds You May Hear 17
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