Heard Your Car AC Making Noise? Find out Why!

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Car AC Making Noise

Car AC making noise? That’s annoying! There’s nothing quite like enjoying the cozy coolness of a car when it’s bitterly hot outside. However, sometimes this comfort can be interrupted by noise coming from your vehicle’s cooling system. While car air conditioners are designed to provide uninterrupted cool air, there are some common problems that can cause unwanted noises.

From a mild rattle to an annoying squeak, these noises can be a sign of a problem that needs to be addressed immediately. Not only are they annoying, but they can also be indicative of more serious issues that require timely attention. In this  TransTRACK article, we will explore the common causes of car AC making noise and how to fix them to keep you comfortable on the road.

Causes of Car AC Making Noise

Here are some reasons why your car AC making noise:

Freon Gas Runs Out

When the freon gas in the AC system runs out, the compressor has to work harder to achieve the required cooling. This happens because freon serves as the main cooling medium in the cooling process. Without enough freon, the compressor has to work harder to reach the desired temperature, which in turn increases the pressure and friction inside. As a result, noise may occur due to the additional load on the compressor.

Dirt on the Evaporator

The evaporator is a component in the AC system that is responsible for absorbing heat from the air in the car cabin. If dirt builds up on the evaporator, the airflow to the evaporator will be blocked. The fan will attempt to push air through the debris, causing additional load on the fan and creating a whirring or buzzing sound.

Foreign Objects

Foreign objects such as leaves, plastic debris, or other debris that enter the AC system can cause noise. When these objects enter the system, they can get wedged between components, causing friction or noise as they rub against each other or other parts in the system.

Improper Installation of AC Components

Improper installation or lack of precision of AC components can cause unwanted vibrations and noises. For example, if bolts are not tightened properly or components are not installed correctly, they may shift or move when the AC is operating, causing noise.

Magnetic Clutch Problem

The magnetic clutch is a component that connects and disconnects the compressor rotation with the car engine. If there is a problem with the magnetic clutch, such as wear or damage, it can cause noise when the clutch is activated or deactivated.

Problems with the Tensioner Pulley

The tensioner pulley is the component that adjusts the tension on the AC belt. If the tensioner pulley has a problem, such as wear or damage, the AC belt may become loose or too tight. This can cause excessive friction between the belt and the pulley, resulting in abnormal sounds.

There is a Leak in the AC

Leaks in the AC system cause the pressure in the system to drop, forcing the compressor to work harder to reach the required pressure. This can result in noise due to increased pressure and internal friction within the compressor.

Blockage in the Expansion Valve

An expansion valve is a component that regulates the flow of refrigerant in an air conditioning system. If a blockage occurs in the expansion valve, it can disrupt the refrigerant flow and cause the compressor to run at an unusual load, resulting in abnormal sounds.

How to Solve the Noise in Car Air Conditioner

Here are the ways to resolve the noise in the car air conditioner:

Check the AC Freon

Be sure to check the freon level in the air conditioning system. If the freon is low or depleted, replenish it according to the manufacturer’s instructions. This will help prevent the compressor from working too hard and reduce the possibility of noise.

Checking and Cleaning the Evaporator

Check the evaporator to ensure that no dirt or dust has accumulated on it. If there is, carefully clean the evaporator using a vacuum or air spray. This will ensure smooth airflow and reduce the possibility of noise.

Cleaning the Car Air Conditioner

Perform a thorough cleaning of the air conditioning system, including the fan, cabin filter, and air ducts. Dust, dirt, and other debris can cause interference with airflow and cause unwanted noises. Be sure to clean all components regularly.

Take it to a Repair Shop

If the noise in the car air conditioner cannot be resolved with the above steps, it is better to take the car to a repair shop or mechanic who is skilled in car air conditioner repair. They can perform a thorough inspection, diagnose the problem, and make the necessary repairs to eliminate the noise.

By taking the above steps regularly and maintaining regular maintenance of your car air conditioner, you can reduce the chances of unwanted noises and keep your car air conditioner performing optimally.

How to Prevent Your Car’s AC from Making Noises

Here are ways to prevent your car air conditioner from making unwanted noises:

Don’t Open the Window Too Often

Avoid opening the windows too often while driving, especially when the air conditioner is running. Opening the windows can introduce dust, dirt, and other foreign objects into the car cabin, which can cause interference with the AC system.

Don’t Smoke in the Car

Avoid smoking in the car. Cigarette smoke can stick to surfaces inside the car, including the evaporator and air filter, causing a buildup of dirt and unpleasant odors. This can interfere with the performance of the air conditioner and cause unwanted noises.

Clean the Cabin Routinely

Perform regular cleaning of the car cabin to remove dust, dirt, and other debris. Use a vacuum cleaner or soft cloth to clean the surfaces inside the car, including the ventilation grilles, dashboard, and seats. Cleaning the cabin regularly will help prevent dirt buildup that can interfere with the performance of the air conditioner.

Perform Routine Servicing

Make sure to perform routine servicing on the car’s AC system according to the schedule recommended by the manufacturer. Routine servicing includes inspection and maintenance of various AC components, such as checking the freon level, cleaning the evaporator, replacing the air filter, and checking the condition of the entire system. By performing regular servicing, you can ensure that your car’s AC remains in good condition and prevent unwanted noises from occurring.

In maintaining the comfort and optimal performance of your car’s air conditioner, nothing is more important than regular and timely maintenance. By using TransTRACK’s  Vehicle Maintenance System, you can monitor and manage your car’s AC maintenance schedule with ease, keeping the AC system clean and efficient.

Don’t let annoying noises ruin your driving experience. With TransTRACK, you can take proactive steps to prevent air conditioning problems before they develop into something more serious. Start your first step towards a quiet and efficient car air conditioner today with TransTRACK!


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