Symptoms And Fixes For Common Car AC Problems

23 June 2023
 Categories: Automotive, Blog

The sweltering heat of summer makes a functioning car air conditioning system essential during those long drives or daily commutes. Yet, car owners may not understand how they should respond to this problem when it arises. 

What Causes A Car AC To Blow Hot Air?

Low refrigerant levels are among the most common causes of hot air from the AC. The refrigerant is vital in cooling the air within the system, so when levels are insufficient, the result is inadequate cooling. Typically, this issue occurs due to leaks within the system. To resolve this problem, have a professional inspect your vehicle for leaks and recharge the refrigerant as necessary.

Another cause of hot air blowing from your vehicle's AC could be a faulty compressor. The compressor pressurizes the refrigerant gas, allowing it to absorb heat more effectively before sending it through the condenser. If it is not functioning correctly, it may not adequately cool down the air that enters your cabin. In this case, seek assistance from an auto mechanic who can diagnose, repair, or replace your compressor if needed.

Clogged cabin air filters may cause warm air output from your car's AC vents because they impede airflow. When these filters become dirty or clogged with debris, such as dust or leaves, they restrict the airflow required for optimal cooling efficiency. Changing out old filters with new ones should resolve this issue.

Why Does Your Car AC Smell Bad?

A musty odor emanating from your car's vents may indicate mold or mildew growth within its components, often due to moisture accumulating in the system. Mold and mildew can be removed by replacing contaminated filters and cleaning affected areas. Bad smells can also result from an accumulation of dust, dirt, or other debris within your car's AC system. Regularly changing the cabin air filter can help prevent this buildup and keep unpleasant odors at bay.

How Can You Fix A Noisy Car AC?

A noisy car AC could be due to a loose or damaged fan belt that connects the compressor pulley to the engine. If you notice high-pitched squealing sounds when your AC runs, have a mechanic inspect the belt for wear and tension issues.

Another noise source from your car's air conditioning system may be a malfunctioning blower motor. If you hear grinding or whirring sounds while your AC is on, seek professional assistance to assess and repair any issues with your blower motor.

Occasionally debris such as leaves or twigs may find its way into your vehicle's ventilation system resulting in unusual noises when you turn on the AC. In this case, removing any visible obstructions should resolve the noise issue.

Contact a local car AC repair service to learn more.