Pontiac tempest 1968 Service Manual page 74

1B-1
AUTOMATIC TEMPERATURE CONTROL
SUBJECT
C O N T E N T S O F T H I S S E C T I O N
PAGE SUBJECT
In-Car Sensor or Ambient Switch 1B-1
Temperature Control Switch -
Variable Resistor
Adjustment 1B-2
Programmer I B - 2
Adjust . . . . 1B-2
Programmer Service . . . . . . . . 1B-2
Disassembly , . . 1B-3
PAGE
Amplifier Assembly Replacement
Instructions . . . . . . . . . . . . . . . . 1B-3
Programmer Wheel Removal . 1B-4
Gear Inspection Instructions . . . . . . . . I B - 4
Motor Replacement Instructions . . . . . . I B - 5
Programmer Wheel Installation
Procedure . . . . . . . . . . . . . . . . . I B - 5
AUTOMATIC TEMPERATURE CONTROL
REMOVE IN-CAR SENSOR (Fig. 1B-1)
PONTIAC
1. Remove glove box.
2. Remove wire connector.
3. Remove aspirator hose.
4. Remove retaining screws.
5. Remove sensor.
When checking with an ohmmeter, the resistance
valve of this sensor should be approximately 1000
ohms at 75°.
TEMPERATURE CONTROL SWITCH VARIABLE
RESISTOR REPLACEMENT (Fig. 1B-2)
PONTIAC
1. Remove control panel.
2. Unsolder leads at back of switch.
3. Remove cord and retain with paper clip or wire.
4. Remove switch retaining screws.
5. Remove switch and save bushing and spring
from shaft.
6. Calibrate dial before replacing control panel in
dash (see below).
BLOWER
SWITCH CONN
MASTER
SWITCH CONN.
POWER FEED CONN.
DE-ICE SWITCH CONN.
RECIRC. CLUTCH
SWITCH CONN!
BI-LEVEL BOOST
SWITCH CONN.
Fig. 1 B-l Automatic Temperature Control - In C a r Housing