Hissing sound heard from unit - Refrigerant flow change

What does Hissing Sound mean?

A hissing sound is occasionally heard from the unit during operation.

• This sound occurs when the flow of refrigerant inside the unit is changing or being adjusted by the system.

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1. 1

   This is a normal operational sound associated with refrigerant flow adjustments; no action is required.

2. 2

   The sound indicates the system is working to maintain desired temperatures.

3. 3

   If the hissing is constant, very loud, or accompanied by other unusual symptoms, consult your dealer.