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1990 944S2 Noticeable intermittent hesitation with A/C on

Heating and Ventilation

Vehicle Information: Model(924/944/968): 944S2; Year: 1990; Body Type: Coupe; Total Mileage: 59500;

This is my first Porsche, purchased 7 months ago. I recently recharged the A/C with R12. The A/C is working great; however, there is a very noticeable short hesitation that occurs intermittently while the A/C is running and while driving. The hesitation happens at all speeds as long as the A/C is on. There is no unusual noise. Everything else seems to be operating properly. Malfunctioning switch? Compressor clutch? Should I be concerned?

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