Efficient auto air conditioner operation is critical for ensuring driver and passenger comfort inside a car. Due to frequent use, however, it is not uncommon for the air conditioners to act up from time to time. As a car owner, you should be aware of common car air conditioner problems so you can seek repair service in good time. Continue reading to learn about some common issues most car owners face with their air conditioners.

Refrigerant leaks

Refrigerant is the chemical fluid responsible for the cooling effect air conditioning units create. Refrigerant can't run out due to normal operation of the air conditioning system, but it can run out if there's a leak. Leaks may develop within the system and cause the coolant to escape. When this happens, occupants of a car will not be able to receive optimal service from their air conditioner. The most obvious symptom of refrigerant leaks is when the unit blows warm air instead of cool air. When you take your car to the mechanic shop for service, they will inspect the system for leaks, seal the leaks and then refill the air conditioning unit with new refrigerant.

Noisy compressor

The compressor in your car air conditioner is the all-important component that pumps refrigerant throughout the system. If you hear unusual noises emanating from under the hood of your car, chances are high your compressor is faulty. A clanking or banging noise may be an indication that something's loose inside the compressor. It could be a piston pin, connecting rod, internal mount, or crankshaft. These noises may also indicate your car air conditioner needs a compressor replacement, especially if you drive an old car. But if you hear a hissing or bubbling noise coming from the compressor, it is likely refrigerant is leaking.

Musty smell

Your air conditioner is supposed to supply cool, clean air inside your car. If the air coming out of your supply vents smells musty, it is likely that there is excess moisture buildup in the evaporator. This usually results in a buildup of bacteria within the system, in turn leading to poor air quality. To remedy the problems, your mechanic will inspect the ductwork to ensure that there are no clogs preventing the free flow of cool air. It could be that the air cooled by the refrigerant in the evaporator is not able to reach your vents, thus resulting in condensation problems.