I HAVW BMW 1999 528I MODEL WHEN THE TEMP ON DASH BOARD IS ON -40 THE AC WILL NOT WORK WHEN THE TEMP IS -3 THE AC I WILL START WORKING PLS HW CAN I CHANGE THE TEMP FROM -40 TO -3.

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This post was auto-generated based upon a question asked on our tech article page here:

You posted an E39 question in the E30 queue. In the front grille or bumper area look for an air temperature sensor. This gives your IHKA control unit the outside temperature. It sounds like the sensor may have been ripped off or damaged or unplugged. An unplugged sensor sends a signal that the outside air is cold so the IHKA control unit will not turn on the AC because it thinks it too cold outside for AC>

- Kerry