Opel 1900 1973 - Heater System - Gt; Flow-Through Ventilation System

9A-2 1973 OPEL SERVICE MANUAL
HEATER SYSTEM - GT
CONTENTS
Subject
DESCRIPTION AND OPERATION:
Flow-Through Ventilation System ................................
Heater System Description
............................................
Heater System Operation ................................................
DIAGNOSIS:
Heater and Defroster
........................................................
MAINTENANCE AND ADJUSTMENTS:
Control Cable Adjustment
..............................................
MAJOR REPAIR:
Removal 81 Installation Instrument Panel
Fresh Air Outlet ..............................................................
Removal & Installation Kick Panel Fresh
Air Outlet ..........................................................................
Removal & Installation Blower
Switch ......................
Removal & Installation Heater
......................................
Removal & Installation Defroster Outlet
..................
Removal 81 Installation Heater
Valve ........................
SPECIFICATIONS:
Specifications ......................................................................
Page No.
9A-2
9A-2
9A-4
9A-4
9A-4
9A-5
9A-5
9A-5
9A-5
9A-0
9A-9
9A-9
DESCRIPTION AND OPERATION
FLOW-THROUGH VENTILATION SYSTEM
A separate ventilation system for direct intake of
outside air is controlled by two plastic fresh air inlet
nozzles in the side kick panels and two lever operated
inlet nozzles located on either end of the instrument
panel assembly.
The air allowed to enter the passenger compartment
will exit through outlets on both sides of the back
glass. See Figure 9A-1.
HEATER SYSTEM DESCRIPTION
The GT heater system consists of two components
assemblies: (1) heater assembly, and (2) control as-
sembly. The heater assembly consists of the heater
housing and air valves; heater core and blower motor
and fan assembly.
Figure 9A-1 GT Air Flow
The flow of air enters the car through the cowl;
passes through the blower fan, through or around the
heater core, past the air inlet door and is then di-
rected to either the floor outlets or defroster outlets
or both depending on the position of the defroster
door.