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  • Admin

1. The AC compressor is still driven by the engine but it does not have the old compressor clutch (the compressor runs continuously).

From the 2009 Tech Book

The air-conditioning compressor switches off automatically at outside temperatures of below approx. 35° F. (2° C.) and cannot be switched on again – even manually – by pressing the “Auto” button.

The pressure relief valve opens at a critical system pressure of 2030 psi (140 bar) to protect the lines from irreparable damage. The valve closes again when pressure compensation is complete. The valve is located directly on the compressor, on the high-pressure side.

At a coolant temperature of T > 244° F. (118° C.), a forced suppression of the air conditioning system is requested of the air conditioning control unit by the DME system via the CAN bus. For this purpose, the electronic control valve sets the compressor to zero delivery mode (both radiator fans running).

A timed full-load shutdown (compressor function is disabled) occurs if the throttle position is greater than 92%. Speed is taken into consideration here when setting the driver set point torque

2. See answer 1.

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  • Admin

Thanks alot man!! you rock!!

the tech book where can i get that from? is it easy or hard?is it useful when the car is no longer under warranty?

The tech books are published by Porsche every year to highlight design changes and improvements. Normally only dealers and shops get these.

We make these books available to our Contributing Members here - to become a Contributing member her just click on the Donate link at the top right of any page and follow the instructions.

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