What is wrong with a car when you turn the air conditioner on & car immediately dies.?

its sensor that kicks idle up sits by gas intake one wire screw in and out no tools its a hand job - buy it find it and do it

The only thing that I can think of is -- if you were driving along and the engine of your auto was working O.K. -- but when you decided to turn on your air conditioning system and threw that extra demand for power from your engine, your computerized controls didn't recognize that sudden extra load and make adjustments to your fuel feed to keep your engine sufficiently supplied with additional fuel/air mixture to the engine to keep it running at rpms in accordance with the accelerator pedal position. I *do* believe that you are going to *have* to seek professional auto repair help.

the air compressor is either locked up or the inner bearing has gone bad in it,that or its frozen up, you,ll more than likely wind up needing a new compressor on it to correct this problem,good luck.

I would say you probably need a new compressor or a bearing in the compressor is froze up.

You definitely have an issue with the A/C system. Do not use until the problem is diagnosed.

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check your alternator ac draws alot of power alternator if it not put out enough it kill the engine