This is used to select the outside (fresh) air position or recirculated air position.
To change the air intake control position, push the control button.
Recirculated air position
With the recirculated air position selected, air from the passenger compartment will be drawn through the heating system and heated or cooled according to the function selected.
Outside (fresh) air position
With the outside (fresh) air position selected, air enters the vehicle from outside and is heated or cooled according to the function selected.
✽ NOTICE
Prolonged operation of the heater in the recirculated air position (without air conditioning selected) may cause fogging of the windshield and side windows and the air within the passenger compartment may become stale.
In addition, prolonged use of the air conditioning with the recirculated air position selected will result in excessively dry air in the passenger compartment.
Condenser Repair procedures
Inspection
1.
Check the condenser fins for clogging and damage. If clogged,
clean them with water, and blow them with compressed air. If bent,
gently bend them using a screwdriver or pliers.
...
Exhaust System Repair procedures
Inspection
1.
Visually check the pipes, hangers and connections for severe corrosion, leaks or damage.
2.
Check for unusual exhaust sounds or abnormal exhaust fumes. ...