Iveco's heating switch valves are generally installed near the heating water tank under the dashboard of the cab, some on the heating water pipe in the running water tank of the engine compartment, and some on the heating water pipe behind the cylinder head. To turn on the warm air of the Iveco car, you need to start the car with the car key first. After the water temperature of the vehicle rises, press the switch of the vehicle air conditioner, turn off the AC button, set it to internal circulation, and then turn the vehicle air conditioner to the red area.