Auxiliary Hvac Unit - Hummer H1 Service Manual

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14-6 Index
Rear Window Defroster Schematic . . . . . 12-95
Right Heated Windshield Inoperative . . . 12-91
Hood
Center Hood Stop Replacement . . . . . . . . 10-49
Front Hood Screen Replacement . . . . . . . 10-50
Grille and Screen Replacement . . . . . . . . 10-49
Guide Bracket Assembly Replacement . . 10-50
Hood and Hinge Replacement . . . . . . . . . 10-47
Hood Latch And Prop Rod . . . . . . . . . . . 10-43
Hood Prop Rod and Bracket Replacement 10-45
Hood Release Cable Replacement . . . . . . 10-44
Hood Retainer Bracket, L . . . . . . . . . . . . 10-50
Hood Retainer Bracket, R . . . . . . . . . . . . 10-50
Latch and Bracket Replacement . . . . . . . 10-43
Outer Hood Seal Replacement . . . . . . . . . 10-48
Right Close-Out Seal and Retainer . . . . . 10-51
Side Hood Stop Replacement . . . . . . . . . 10-49
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-61
Horn Assembly Replacement . . . . . . . . . 10-53
Horn Replacement . . . . . . . . . . . . . . . . . . 12-61
Horn Schematic . . . . . . . . . . . . . . . . . . . . 12-63
Horns Inoperative . . . . . . . . . . . . . . . . . . . 12-62
Mounting Bracket Replacement . . . . . . . 10-53
Hourmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-30
Hummer Service Hotline . . . . . . . . . . . . . . . . . . 1-2
HVAC
Ambient Temperature Switch . . . . . . . . . 11-34

Auxiliary HVAC Unit

A/C Drain Tube(s) Replacement . . . . 11-48
Blower Motor Replacement . . . . . . . . 11-49
Blower Switch Replacement . . . . . . . 11-47
Evaporator/Heater Core Replacement 11-49
Expansion Valve Replacement . . . . . 11-50
Heater Hose Replacement . . . . . . . . . 11-47
High-Pressure Hose Replacement . . . 11-48
Low-Pressure Hose Replacement . . . 11-49
Replacement . . . . . . . . . . . . . . . . . . . . 11-46
Blend Door Motor . . . . . . . . . . . . . . . . . . 11-42
Compressor
Description . . . . . . . . . . . . . . . . . . . . . . 11-1
Condenser . . . . . . . . . . . . . . . . . . . . . . . . 11-34
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 11-36
Defrost Duct and Windshield
Nozzles Replacement . . . . . . . . . . . . . . . 11-26
3-1-01
Drain Tube Replacement . . . . . . . . . . . . . 11-24
Essential Tools . . . . . . . . . . . . . . . . . . . . . 11-51
Heater Hose Replacement . . . . . . . . . . . . 11-22
High Pressure Cutoff Switch . . . . . . . . . . 11-35
Low Pressure Cutoff Switch . . . . . . . . . . 11-34
Main HVAC Unit . . . . . . . . . . . . . . . . . . . 11-37
Blower Motor . . . . . . . . . . . . . . . . . . . 11-38
Diverter Doors . . . . . . . . . . . . . . . . . . 11-37
Evaporator . . . . . . . . . . . . . . . . . . . . . 11-38
Expansion Valve . . . . . . . . . . . . . . . . 11-38
Heat Unit Cowl Insulation
Replacement . . . . . . . . . . . . . . . . . . . 11-24
Heater Core . . . . . . . . . . . . . . . . . . . . 11-38
High Pressure Cutoff Switch . . . . . . . 11-38
Replacement . . . . . . . . . . . . . . . . . . . . 11-39
Thermostatic Cycling Switch . . . . . . . 11-38
Rear Console Replacement . . . . . . . . . . . 11-46
Receiver Dryer Replacement . . . . . . . . . . 11-21
Receiver/Dryer . . . . . . . . . . . . . . . . . . . . . 11-34
Receiver/Dryer Pressure Switch
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-21
Special Tools . . . . . . . . . . . . . . . . . . . . . . 11-52
Specifications . . . . . . . . . . . . . . . . . . . . . . 11-13
System Description . . . . . . . . . . . . . . . . . . 11-1
System Diagnosis . . . . . . . . . . . . . . . . . . . . 11-8
System Performance Checks . . . . . . . . . . . 11-2
Unit Service . . . . . . . . . . . . . . . . . . . . . . . 11-37
Vacuum Door Motor . . . . . . . . . . . . . . . . 11-41
Water Control Valve . . . . . . . . . . . . . . . . 11-22
Water Control Valve Replacement . . . . . 11-23
HVAC Systems
HVAC Blower Schematic . . . . . . . . . . . . 12-80
HVAC Compressor Inoperative . . . . . . . . 12-75
HVAC Compressor Schematic . . . . . . . . 12-82
HVAC Main Blower Inoperative
ALL BUT High . . . . . . . . . . . . . . . . . . . 12-75
HVAC Temp Blend Door/Rear Blower . . 12-81
HVAC Temperature Door Inoperative . . 12-77
Hydro-Boost
Bleeding the Hydro-boost System . . . . . . . 7-13
Hydro-Boost Replacement . . . . . . . . . . . . . 7-13
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