Hummer H1 (2002+). Manual - part 184

 

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 Heating/Ventilation/Air Conditioning (HVAC)  11-15

  

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05745159

 

Figure 11-5:   Vacuum Door Motors

 

 Vacuum Door Motor Arm Positioning

 

OFF

MAX

A/C

A/C Blend

Face

Floor

Defrost/

Floor

Defrost

 

Floor out

out  out

in

out

in

out

out

Defrost 
blockoff

out

out out

out

out

out out

in

Face

out

in in

half

in

out

out 

out

Defrost

out

out

out

out

out

out

out

in

Recirculate

out

in

out

out

out

out

out

out

7-S11-031

FLOOR DOOR MOTOR (RED)

FACE DOOR MOTOR(YELLOW AND BROWN)

DEFROST BLOCKOFF DOOR MOTOR(BLUE)

DEFROST DOOR MOTOR (SILVER)

RECIRCULATE DOOR MOTOR

(ORANGE)

 

11-16

Heating/Ventilation/Air Conditioning (HVAC)

 

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CLIMATE CONTROL HEAD REPLACEMENT

 

Removal 

 

1.

Remove front console.

2.

Remove screw attaching climate control head to support
plate side bracket (Figure 11-6).

3.

Pull climate control head from behind support plate so that
it angles away from longer side bracket.

4.

Pull climate control head from shorter side bracket.

 

Installation 

 

1.

From behind support plate, angle climate control panel 
behind shorter of two side brackets.

2.

Push climate control head toward longer side bracket until
flush, then secure it with a screw.

3.

Slide rear bracket onto back lip of climate control head.

4.

Install front console.

 

Figure 11-6:   Climate Control Head Replacement

CONSOLE

CLIMATE CONTROL

SUPPORT PLATE

FACE PLATE

HEAD

AUXILIARY 

HEAT-A/C

SWITCH 

 

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 Heating/Ventilation/Air Conditioning (HVAC)  11-17

  

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05745159

 

PRESSURE HOSE TORQUE SPECIFICATIONS

 

CAUTION: 

 

To avoid potential thread or fitting damage, hand

start connections before using wrenches. 

 

Air conditioning system fittings are a common source of refrig-
erant leaks. When service requires disconnecting and connect-
ing fittings, observe the following: 

• When tightening or loosening hose and tube fittings, use 

two wrenches for equalized support  (Figure 11-7). 

 

Figure 11-7:   Hose and Tube Fittings 

 

• Plug open ends of hoses after disassembly. Do not re-

move plugs from hose fittings until each component is 
ready for connection. This will prevent moisture and dirt 
contamination which can cause compressor wear and 
system blockage. 

• Make sure that O-rings are properly seated before as-

sembly  (Figure 11-8). 

• Carefully interlock male and female ends of hoses  

(Figure 11-9). 

• Before making any hose and tube connection, apply a 

few drops of refrigerant oil to the O-rings and threaded 
portions of the connector. Make connections quickly. 

• Tighten fittings to proper torque specification based on 

hose size. 

Figure 11-8:   Correct Seating O-Rings

Figure 11-9:   Proper Connection of Hose End

Pressure Hose Torque Values

Hose Size

Torque

(Ft. Lb.)

Torque

(Newton Meters)

Minimum Maximum Minimum Maximum

#6 Liquid 
Hose

11

13

15

17

#8 Discharge 
Hose

15

20

20

27

#10 Suction 
Hose

21

27

28

36

#12 Suction 
Hose

24

28

33

38

INCORRECT

INCORRECT

PROPERLY

SEATED

FEMALE

MALE

CORRECT

INCORRECT

 END

 END

11-18

Heating/Ventilation/Air Conditioning (HVAC)

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AIR CONDITIONING PRESSURE HOSE 
REPLACEMENT

WARNING:  Air conditioning system components are
subject to high-pressure R-134a gas. Always discharge
pressure and contain refrigerant using approved service
equipment. Use extreme care when handling R-134a.
Direct contact with skin may cause frostbite. Do not
smoke in areas where R-134a is stored or used. Failure
to follow these warnings may result in serious injury.

CAUTION: Cover all open lines to prevent contamination.

Suction Manifold Hose Assembly 

Figure 11-10:   Suction/Discharge Hose

Mounting

Suction Manifold Hose Replacement

Removal 

1.

Discharge the air conditioning system.

2.

Remove air cleaner splash shield

3.

Disconnect auxiliary hose connection (if equipped).

4.

Disconnect the suction hose from the expansion valve
manifold, discard the O-ring (Figure 11-11:).

5.

Disconnect the suction hose at the compressor junction
block, discard the O-ring  (Figure 11-10).

6.

Remove the hose assembly from the vehicle.

Figure 11-11:   Suction Manifold Hose Removal

Installation

1.

Install the suction hose onto the expansion valve manifold 
block with a new O-ring.

2.

Torque the fitting to 21-27 lb-ft (28-36 N•m).

3.

Install auxiliary unit refrigerant line using new O-ring (if
equipped).

4.

Torque auxiliary unit line to 21-27 lb-ft (28-36 N•m).

5.

Install suction hose onto compressor junction block fitting
with a new O-ring.

6.

Torque the fitting to 21-27 lb-ft (28-36 N•m).

7.

Evacuate system for 30 min.

8.

Recharge system with 3lbs. 2oz. R134a.

9.

Performance test A/C

10. Install air cleaner splash shield.

00-S11-003

SUCTION HOSE

JUNCTION BLOCK

DISCHARGE 

HOSE

O-RING

O-RING

00-S11-004

LIQUID

SUCTION HOSE

EXPANSION VALVE
MANIFOLD BLOCK

AUXILIARY
OUTLETS

LINE