However, this problem is also common when there’s a blown fuse, a poor ground connection or a bad engine coolant temperature switch. However, if the Freon levels become low, the clutch may not engage. You know it’s happening because you hear the typical clicking sound that occurs when it’s engaged. When the air conditioning system works as it should, the clutch engages to pressurize what’s inside the compressor. RELATED: Car AC Not Blowing Cold Air? Common Causes 2. However, this problem can also be caused by a bad condenser or compressor, so you need to do some diagnostics before adding Freon. When the system isn’t working right, you might first notice that the air becomes warmer or simply doesn’t get as cool as it once did.Īs there becomes less Freon in the system, the air should get warmer. The entire purpose of having air conditioning in the car is to keep the cabin cool. Here is a more detailed list of the signs of low freon in a car to look for: 1. (Mind you, if you’re seeing puddles that are oily or are coloured liquid, such as green, yellow or red, you need to take it to a shop for repair.The main symptoms of low freon in a car include: It can be alarming to see liquid dripping and puddling under your vehicle after you’ve parked it, but it’s just the water draining away. This ice melts when the system is shut off, and the water flows down a tube and out through a one-way valve. Still under low pressure, it returns to the compressor to start the cycle all over again.īecause the evaporator gets so cold, moisture in the air blowing over it can condense and freeze on the evaporator’s fins. Having transferred its cold to the evaporator, the refrigerant warms up enough that it boils-with that low boiling point, it doesn’t take much-and turns back into a vapour. The liquid refrigerant is very cold and it chills the evaporator, which is surrounded by the warm air that’s making your car so uncomfortable on a hot day.Ī fan blows that warm air over the evaporator, which cools it down and turns it into that welcome flow of cold air coming out of the vents. Like the condenser, the evaporator is also a miniature radiator, but it deals with cold, not heat. This advertisement has not loaded yet, but your article continues below. It now flows into the evaporator, which is inside the vehicle’s cabin near the front of the dash. As it passes through the control system, the refrigerant’s pressure drops on its way into the low-pressure side of the air conditioning system. This now travels into a flow-control system, either a valve or tube, which determines how much refrigerant to allow through depending on how much cabin cooling is required. As the refrigerant cools, it condenses into a liquid. Just as a radiator does with hot engine coolant, the condenser pulls heat from the hot vapour, transferring it to the outside air. It travels to the condenser, which looks like a miniature radiator and is mounted in the engine compartment. The compressor pressurizes it, which heats it up, and pumps it into the high-pressure side. The refrigerant enters the compressor as a vapour. Article content Recharging the air conditioning on a Toyota.Īs odd as it sounds, you need heat to make cold.
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