Aux Fan is not spinning when A/C is turned on. The aux fan is fully functional as it spins full speed when I unplug the high pressure sensor with A/C switched on.

A/C compressor clutch spins and the gas pressures have been tested by a garage. However no ice cold air.

One thing I have noted is there is a loud bang/click when i turn the A/C on? What could this noise be?

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2012 X5 30d