DAEWOO M-150 BL2
SECTION 7A
HEATING AND VENTILATION SYSTEM
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in B unless otherwise
noted.
TABLE OF CONTENTS
Description and Operation 7A-2. . . . . . . . . . . . . . . . . .
Heating and Ventilation Systems 7A-2. . . . . . . . . . . .
Component Locator 7A-3. . . . . . . . . . . . . . . . . . . . . . . .
Control Assembly 7A-3. . . . . . . . . . . . . . . . . . . . . . . . .
Blower Module Assembly 7A-4. . . . . . . . . . . . . . . . . . .
Air Distributor and Heater Module
Assembly 7A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Informatin and Procedures 7A-6. . . . . . .
Heater System 7A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Insufficient Heating or Defrosting 7A-6. . . . . . . . . . . .
Blower Electrical 7A-10. . . . . . . . . . . . . . . . . . . . . . . . .
Improper Air Delivery or No Mode Shift 7A-11. . . . . .
Too Much Heat 7A-13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls 7A-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Noise 7A-16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Instructions 7A-18. . . . . . . . . . . . . . . . . . . . . . . .
On-Vehicle Service 7A-18. . . . . . . . . . . . . . . . . . . . . . . . .
Control Assembly and Control Cables 7A-18. . . . . . . Blower Motor and Cooling Hose 7A-20. . . . . . . . . . . .
Blower Resistor 7A-20. . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Motor Switch 7A-21. . . . . . . . . . . . . . . . . . . . . .
Heater Hoses 7A-22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater Module 7A-24. . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Module 7A-25. . . . . . . . . . . . . . . . . . . . . . . . . . .
Defroster Duct and Hoses 7A-26. . . . . . . . . . . . . . . . .
Ventilation Duct 7A-27. . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Repair 7A-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater Core 7A-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 7A-29. . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Specifications 7A-29. . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 7A-29. . . . . . . . . .
Special Tools and Equipment 7A-30. . . . . . . . . . . . . .
Special Tools Table 7A-30. . . . . . . . . . . . . . . . . . . . . . .
Schematic and Routing Diagrams 7A-31. . . . . . . . . .
Non-A/C Diagrams 7A-31. . . . . . . . . . . . . . . . . . . . . . .
Air Flow Through Ducts (Non–A/C) 7A-32. . . . . . . . .
HEATING AND VENTILATION SYSTEM 7A–5
DAEWOO M-150 BL2
AIR DISTRIBUTOR AND HEATER MODULE ASSEMBLY
(Left–Hand Drive Shown, Right–Hand Drive Similar)
D108A403
1. Defroster Duct Hose
2. Defroster Duct
3. Ventilation Duct
4. Heater Module Assembly
5. Plastic Washer
6. Temperature Control Lever
7. Temperature Control Lever Bearing
8. Defroster Link
9. Defroster Lever
10. Spring
11. Ventilation Link
12. Ventilation Lever13. Temperature Control Link
14. Heater Link
15. Heater Lever
16. Cable Link
17. Left Heater Case
18. Defroster Valve
19. Ventilation Valve
20. Temperature Control Valve
21. Right Heater Case
22. Case Seal
23. Heater Core Cover
24. Heater Core
