Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Air Distribution System: Notes
The air distribution system distributes air to the passenger compartment. This is used jointly by the climate system's heating system and cooling system. The blower fan draws air into the system.
Fresh air is taken from the opening between the bonnet and the windscreen.
The air passes through the filter and the evaporator, past the temperature throttle valve and through the heat exchanger if necessary before it is released into the passenger compartment through the outlet.
After circulation the air leaves the passenger compartment via the pump-out valves in the cargo compartment.
The air distribution system consist of:
- distribution housing:
- blower fan
- throttle valve
- filter
- recirculation throttle valve
- air ducts
- outlets.
Three throttle valves control the outgoing air to:
- the defroster
- the ventilation outlets
- the floor outlets.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.