Opel 1900 1973, Service Manual

Page: 598 / 625

System controls are the AIR knob controlling the
three speed blower motor switch and the TEMP
knob which controls the setting of the thermostatic
switch. When operating this system, the heater must
be off for maximum cooling.
DIAGNOSIS
TROUBLE DIAGNOSIS GUIDE
Air Knob
Insufficient Cooling
Turning the AIR knob clockwise operates the
speed blower motor.
CHECK AIR FLOW
1973 OPEL SERVICE MANUAL
AIR CONDITIONER SYSTEM
OPEL 1900 MANTA
CONTENTS
Subject
DESCRIPTION AND OPERATION:
General Description of System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...”
Operation of Controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .
DIAGNOSIS:
Diagnosis Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..“................... . . . . . . . . .
MAINTENANCE AND ADJUSTMENT:
Adjustment of Thermostatic Switch . . . . . . . . . . . . . . . . . . . . . . . . .
MAJOR REPAIR:
Removal Installation Blower Switch . . . . . . . . . . . . . . . . . . . . . .
Page No.
Removal Installation Temperature Control Switch
Removal Installation Resistor Assembly . . . . . . . . . . . . . .
Removal Installation Blower Motor Assembly . .
SPECIFICATIONS:
Specifications . . . . . . .
DESCRIPTION AND OPERATION
GENERAL DESCRIPTION OF SYSTEM
The air conditioner is intended to give maximum
cooling comfort within the vehicle. To do this,
attention must be given to the following Sections.
The system operates on recirculated air only and is
entirely independent of the vehicle heater.
T e m p K n o b
This knob may be regulated to control the degree of
cooling desired. Fully clockwise provides maximum
cooling; however, turning the knob to the center
tent position provides adequate cooling for highway
operation.
When maximum cooling is required, outside air
should not be admitted to the car.
Recirculated inside air is drawn into the unit, passed
through the evaporator core and into the car through
the adjustable outlets in the evaporator case.
Operation of Controls
When the unit is set for maximum cooling and the
vehicle is being driven continuously at highway
speeds or at elevations of
or more, there is
a possibility of the formation of ice on the evaporator
core fins.