Let’s explore the difference between your car’s air conditioner (A/C) and heater:

1. A/C System:
   • The A/C system uses refrigerant to remove heat from the cabin.
   • Compressor: The engine-driven compressor pressurizes the refrigerant, which then flows through the system.
   • Evaporator: The evaporator cools the air by absorbing heat from it.
   • Blower Fan: The blower fan circulates the cooled air into the cabin.
   • Purpose: The A/C keeps you cool during hot weather by removing heat from the interior.
2. Heating System:
   • The heater uses hot engine coolant flowing through its core to warm your car’s interior.
   • Heater Core: The heater core is like a small radiator. Hot coolant passes through it, and the blower fan blows air over it.
   • Blower Fan: The same blower fan used for A/C also blows air over the heated coolant.
   • Purpose: The heater keeps you warm during cold weather by using the engine’s heat.
3. Common Connection:
   • The air management system connects both cooling (A/C) and heating (heater) systems.
   • The heater is more critical because it’s linked to the engine via the coolant.

In summary, the A/C removes heat using refrigerant, while the heater warms your car’s interior using hot engine coolant. Both systems work together to maintain a comfortable cabin temperature.