Alero L4-144 2.4L DOHC VIN T SFI (2000)
Air Duct: Description and Operation
Air Distribution System Description
A vacuum regulates the control of air through the system. Various positions on the control cause the mode valves to mix and direct cooled, heated and
outside air through the air ducts.
Air flows through the HVAC system as described for each of the following modes:
OFF: A light bleed of air flows from all of the outlets.
MAX: Recirculated air flows through the instrument panel outlets.
NORM, A/C: Outside air flows through the instrument panel outlets.
BI-LEVEL:
Outside air flows through the following outlets:
^
The instrument panel outlets
^
The floor outlets
VENT:
Outside air flows through the instrument panel outlets. The compressor does not operate.
HEATER:
Most of the air flows through the floor outlets. A small amount of air flows through the defroster duct.
