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Old 05-16-2014, 08:26 AM
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upallnight upallnight is offline
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The low side pressure reading is correct for that ambient temp but what is the high side reading? You need to know both in order to diagnosis the problem. There could be blockage which could cause the high side to go too high and that is why the compressor is cycling off. The fact that the aux fan is not spinning is another reason why the high side reading is climbing pass the high side limits.

Take the X on a highway or freeway where there is no stop and go traffic and see if the ac is working better. Get a thermometer in the vent and tell us what the lowest reading is.

A bad fan will not throw a fault code since it is not emission related. You can use BMW specific software to read a fan fault and command the fan to turn on.
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