Set the temperature to cold, the lowest setting.Ensure the fan is high, the temperature selector is turned to COLD, and the A/C and recirculate light indicators are on. If you have an Economy button, make sure that it is off. One contains UV dye which you may need if you have a leak and are trying to find it. We recommend the Arctic Freeze Recharge kit because it contains two large R134a refrigerant bottles. It has a gauge you will first use to test your A/C system. You will need a Recharge Kit to purchase at the local auto parts store or online at Amazon. This is the essential operation of the A/C system, so let’s move on to some troubleshooting tips. The air then blows through the evaporator, which makes it get cold. The low-temperature refrigerant passes through the evaporator, which causes the evaporator to get cold. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator.
From here, the refrigerant goes to the evaporator. So in the expansion unit, the refrigerant temperatures drop below the outside temperature. Removing pressure from fluid causes it to lose temperature. Put pressure into a fluid you will increase its temperature. This is the opposite process that the compressor performs. The expansion of the refrigerant causes the temperature of the refrigerant to drop. The pressure drops in the expansion valve, allowing the refrigerant to expand. After that, the refrigerant goes through the expansion valve. Next in the system is the receiver-drier, whose primary purpose is to remove moisture from the A/C refrigerant. By flowing through the condenser, the refrigerant loses heat, which converts into a warm liquid from hot gas. From the compressor, the fluid goes to the condenser. The operation of the A/C in your car is based on the First Law of Thermodynamics if you want to learn the physics behind it. The compressor’s purpose is to add pressure to the system by compressing the refrigerant. One of the key components of the A/C system is the compressor. Compressors switch on and then off very quickly.No pressure or low refrigerant levels in the A/C System.Troubleshooting the A/C Common Air Conditioner Problems and Solutions Technical Specs Common A/C Problems While the pictures in this article are of Mercedes Benz cars, this guide is written to apply to all makes and models.Ĭommon A/C Problems How the A/C System Works. This article will overview the A/C system, common problems, and repairs you can perform independently. Maybe even charge the A/C system if needed. Is your air conditioner A/C not working or blowing hot air? The Air Conditioner system can get very complicated in cars, but that doesn’t mean that you can’t perform some troubleshooting yourself.
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