Your car’s AC system is a closed-loop refrigeration cycle that removes heat from the cabin air. Understanding how it works can help you identify problems early and maintain comfort in hot weather.
The system has five main components: the compressor, condenser, expansion valve, evaporator, and refrigerant. The compressor pressurizes the refrigerant, the condenser releases heat outside the car, the expansion valve drops the pressure, and the evaporator absorbs heat from the cabin air.
Most modern vehicles use R-1234yf refrigerant, replacing the older R-134a. The newer refrigerant is more environmentally friendly but requires specialized equipment for service.
Common AC problems include refrigerant leaks, compressor failure, clogged condenser, and electrical issues. A gradual loss of cooling usually indicates a slow leak, while a sudden failure might be a compressor or electrical problem.
Your cabin air filter plays a crucial role in AC performance. A clogged filter restricts airflow and reduces cooling efficiency. We recommend replacing it every 15,000-20,000 miles.
Running your AC regularly — even in winter — helps keep the system lubricated and seals healthy. Turn it on for a few minutes every couple of weeks to prevent seals from drying out.
Annual AC system checks are recommended before summer. Our technicians test pressure, check for leaks, and ensure all components are functioning optimally so you stay cool when you need it most.