How the heat work in a 1983 CJ7 jeep?

In a 1983 Jeep CJ7, the heating system works by drawing in engine coolant, which is heated as it circulates through the engine. This hot coolant then flows into the heater core, a small radiator located inside the cabin. A blower fan pushes air through the heater core, warming it before it enters the passenger area through vents. The driver can control the temperature by adjusting the thermostat and fan speed settings.