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Abnormal Noise from Tubing

WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM DIAGNOSIS CHART

Condition Possible Cause Action
A droning noise is heard from inside of the vehicle, but not particularly noticeable in engine compartment  Faulty tubing clamps Reposition clamps or increase the number of clamps  .
Resonance caused by pulsation from variations in refrigerant pressure Attach a silencer to tubing, or modify its position and length  .