Pontiac Fiero 1988 Service Manual page 1047

AIR CONDITIONING: S Y S T E M C H E C K
Overall A/C System Check Complete this procedure with the tem-
This procedure is an overall check of the Air perature outside the car above 60 °F (16 °C) and
Conditioning System. All of the steps can be
w i t h t h e e l
W
n e
i n n i n g at idle,
performed without the use of tools or without
disassembly. References to other sections of
the manual are given which provide detailed
diagnostic procedures.
Set A/C Controls: Expected Result (Refer To:
1.
OFF
FanLO
@ Fan is not running.
8A-63 Blower Controls
2. Move Temperature Lever rapidly back and forth
© Temperature
Door
hits stop in each direction.
8A-65 Air Delivery
3. Heater
Temperature Lever at HOT
® Blower runs at low speed.
° Warm air flows
from
floor outlets.
© Slight
air flow at
windshield
and
side window
outlets.
i 8A-63 Blower Controls
8A-65 Air Delivery ;
4.
Move Fan
Switch
from
JL.0
to
H I ® Increased
air flow
at each step.
8A-S3 Blower Controls
5. DEF
• Warm
air
flows
from
windshield
and
side window
outlets.
• Slight air flow at floor outlets.
® Compressor turns on.
8A-65 Air Delivery
8A-64 Compressor Controls
6. VINT
Temperature Lever at COLD
® Air at outside temperature flows from Instrument
Panel outlets.
• Compressor does not run.
8A-65 Air Delivery
8A-64 Compressor Controls
7. BI-LEVEL
• A i r flows from Instrument Panel and floor outlets
with
slight air flow at windshield.
© Compressor turns on.
° Engine coolant fan may run.
• Air flow becomes cold.
8A-65 Air Delivery
8A-64 Compressor Controls
8A-31 Coolant Fans
8A-64 Compressor Controls
8. NORMAL
° Air flows from Instrument Panel outlets with slight
air flow at floor.
• Compressor continues to run.
8A-65 Air Delivery
8A-64 Compressor Controls
9. MAX
• Blower noise increases as outside
air door
closes.
8A-65 A i r Delivery
10. OFF © Blower and Compressor turn off.
8A-63 Blower Controls
8A-64 Compressor Controls