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Why does my car AC compressor turn on and off?

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... compressor to cycle on and off. If it is doing so rapidly, though, it can indicate an improper charge (such as being low on R-134a refrigerant). Once the air conditioning system is properly charged, it should no longer be a problem. Have questions? Ask the pro: http://bit.ly/1n0FHg8. read more

Got home and began to slowly put the R-134a into the car air conditioner system with the AC turned on and the temperature set fully to cold and the blower fully on. The compressor was fully on and the car just was barely cooling before I began adding the freon into the car – but it certainly was not keeping up and was not cool enough. read more

Since the mid-1990s, most cars equipped with air conditioning have also been outfitted with electronic modules that tell your car’s AC compressor to cycle on and off. Although it may be alarming the first time it happens at a stoplight or when you are idling at the store, it is very normal. read more

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