The compressor is responsible for pressurizing the refrigerant and circulating it through the AC system. It converts low-pressure refrigerant gas into a high-pressure gas and sends it to the condenser. The compressor is powered by the engine via the serpentine belt.

The condenser is located at the front of the vehicle, typically near the radiator. It dissipates heat from the refrigerant, turning it from a high-pressure gas into a high-pressure liquid. The condenser works by releasing heat from the refrigerant to the outside air as the vehicle moves.

The evaporator is located inside the cabin, typically under the dashboard. It absorbs heat from the air inside the vehicle, cooling it as the refrigerant flows through the coils. As the refrigerant evaporates from a liquid to a gas, it draws heat away from the air, lowering the temperature inside the cabin.

An expansion valve controls the flow of refrigerant into the evaporator in a car's air conditioning system. It lowers the refrigerant's pressure, causing it to cool down. This helps the refrigerant absorb heat from the air inside the vehicle, allowing the AC to cool the cabin effectively.

A blower motor is part of a car’s HVAC system that circulates air through the cabin, blowing air over the evaporator for cooling or the heater core for warming, and adjusting airflow speed based on settings.

A blower motor resistor controls the speed of the blower motor by regulating the electrical current. It allows different fan speeds, and if it fails, the blower motor may only work at certain speeds or not work at all.

A cabin air filter is a component in a car’s HVAC system that filters the air entering the cabin. It traps debris, ensuring the air inside the vehicle is clean and fresh.

A clogged or dirty cabin air filter can reduce airflow and air quality, making it important to replace it regularly for clean breathing air.

A heater core is a small radiator-like component in a car’s HVAC system that uses hot coolant from the engine to heat the air inside the cabin. The heater core transfers heat to the air blown over it, providing warmth during colder weather.

A thermostat in a car’s HVAC system regulates the temperature by controlling the flow of coolant to the heater core. It opens and closes based on the engine’s temperature, allowing hot coolant to flow into the heater core when the engine reaches the right temperature, ensuring the cabin warms up efficiently.

A refrigerant recharge is the process of adding refrigerant to a car’s air conditioning system to restore its cooling ability. Over time, refrigerant can leak or lose effectiveness, reducing the system’s performance.

Recharging the system ensures it has the correct amount of refrigerant, allowing the AC to properly absorb and release heat, keeping the cabin cool and comfortable.