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1996 993 C4S A/C Rattle noise

Heating and Ventilation

Vehicle Information: Model: 993 C4S; Year: 1996; Body Type: Coupe; Total Mileage: 26,670;

Rattling noise when A/C is on and outside temperature is over 105 degrees. Noise seems worse when engine is under load during downshift. Noise not present or very low at normal cruising speeds. Noise immediately goes away when A/C is turned off. Noise sounds like it's coming from behind the left rear seat.

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