Checking the operation of heating and ventilation

Pic. 16.3. Heating and ventilation system control panel: 1 – fan speed switch; 2 - button for turning on the air conditioner (additional equipment); 3 – air temperature controller; 4 - button for turning on the recirculation mode; 5 - air flow direction switch

1. With the engine warm, turn the air temperature control to the maximum temperature position and check whether warm air enters the vehicle interior (pic. 16.3).

2. Turn the air temperature regulator to the minimum temperature position - after a while only cold air should come out of the deflectors, otherwise the air dampers do not close tightly.

3. Check if the air is distributed to the head and legs.

4. Check fan operation at all speeds.