The air conditioning compressor acts as the pump of your automotive air conditioning system. The AC compressor squeezes refrigerant inside the system and circulates to the condenser and then to the evaporator. The evaporator is where the pressure is released causing cold air, which then returns the refrigerant to the air conditioner compressor to be re-pressurized. The air conditioning compressor is driven by a drive belt that is powered by the engine and can be engaged and disengaged by an electromagnetic coil on the front of the air conditioning compressor.
Most of your automotive air conditioning repair is better off left to a professional air conditioning repair shop. Recharging the refrigerant, especially, requires special equipment and tools that most people do not own. However, there are a couple things that you can do. First, make sure that you have your automotive air conditioning systems checked regularly according to your vehicle's owner's manual. Next, if you live in a place with a cooler climate, it might not make much sense to run the air conditioner during the winter months, but still many shop air conditioning repair technicians recommend running your air conditioning systems regularly, because it contains a light mineral oil in the refrigerant to keep the AC compressor properly lubricated. The general rule of thumb is somewhere between 10 to 15 minutes per month. Some heating, ventilation, and air conditioning systems also engage the AC compressor for defrost mode (for example, most GM vehicles). That said, if you take care of your air conditioner, it will take care of you.
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