If your air conditioning isn't working, it can quickly become an uncomfortable ride. Luckily, there are some easy at-home fixes that you can try before going to the mechanic.
Before car air conditioning became widespread, drivers simply rolled down their windows and used the blower to circulate air. This system was primitive, and it didn't keep dust, pollen, or other contaminants from getting inside the vehicle. In addition, it took a lot of fuel to drive the car with its windows down.
Today, cars have air conditioning that not only cools the passenger cabin, but also helps lower humidity, so you and your passengers can ride comfortably. It's a muchneeded feature, especially in hot weather. Here's how it works:
Your car air conditioning system uses a special liquid refrigerant, known as R134A. This liquid goes through a series of high-pressure hoses and what look like mini versions of radiators. The first "radiator" is called the compressor. The compressor compresses the refrigerant, increasing its temperature and pressure. It then moves to the condenser, where it's cooled by air flowing around the twisting coils. This allows the refrigerant to liquefy and turn back into a cold, low-pressure liquid.
From the condenser, the refrigerant travels to the evaporator. This part looks a lot like a radiator, and it's where the magic happens. The evaporator turns the liquid refrigerant into cool, dry air. This air is then blown into the passenger compartment through vents located under the dashboard.
The evaporator core has another feature, too. It has tiny holes in the side that allow the air to come into contact with the coils. This enables the refrigerant to evaporate at even lower temperatures, cooling the air in the passenger cabin. The air is then blown out of the air vents, making your trip in the car more enjoyable.
While there are many possible causes for air conditioning problems, the most common one is low refrigerant. This is usually the result of a leak somewhere in the system. Using an at-home leak detection kit can help you find the source of the problem.
If you're not sure which component is the culprit, it's a good idea to start with the compressor. To test the compressor, first turn on your car's AC and listen for a sound similar to a loud pop. Then, disconnect the wires from the compressor's electric clutch. When you reconnect the wires, if there is no sound, the clutch has likely failed.
Other common air conditioning issues include weak airflow, which can be caused by a clogged blower fan. The problem may also be the result of a defective expansion valve or core case. Additionally, it could be a result of mold or mildew in the evaporator core from residual moisture. You can clean the evaporator core and vents with an automotive interior cleaner. Finally, you might need to replace the cabin air filter or install a new one. The latter is important for reducing harmful pollutants that enter your vehicle.
No comments yet