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Daewoo Matiz (2003 year). Manual - part 189

7A – 14 HEATING AND VENTILATION SYSTEM

Too Much Heat (Cont’d)

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Step

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Action

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Value(s)

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Yes

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1. Check the temperature door travel, the cables,

and the linkage.

2. Verify that the temperature door goes to full cold.
3. Check the temperature door for full hot.
Is the temperature door travel correct?

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–

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System OK

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–

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1. Check for hot air leaks from the engine

compartment to the blower inlet.

2. Repair as needed.
Is the repair complete?

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–

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System OK

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–

HEATING AND VENTILATION SYSTEM 7A – 15

CONTROLS

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Step

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Action

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Value(s)

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Yes

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Verify the customer’s complaint.
Are the customer’s concerns verified?

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–

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Go to Step 2

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System OK

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Is excessive effort required to move a control?

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–

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Go to Step 5

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Go to Step 3

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Does a door move too easily on a high-blower
setting?

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–

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Go to Step 4

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System OK

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1. Replace the Bowden cable with a longer cable.
2. Add a loop to the cable routing to increase the

effort required to move a control.

3. Check for instrument panel interference with the

new cable routing.

Does the control operate properly?

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–

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System OK

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Go to Step 5

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Check the cables for improper routing, kinks, wiring
interference, or other instrument panel interference.
Is any cable problem found?

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–

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Go to Step 6

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Go to Step 7

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Repair as needed.
Is the repair complete?

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–

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System OK

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–

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1. Remove the cable from any door that binds on

the cable.

2. Cycle the door manually.
3. Check for door binding.
Is there any door binding?

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–

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Go to Step 8

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Go to Step 11

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Check the door seal for proper installation.
Is the door seal OK?

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–

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Go to Step 9

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Go to Step 10

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1. Check a binding door for shaft alignment, a bent

shaft or a bent door, or a warped case.

2. Repair, as needed.
Is the repair complete?

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–

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System OK

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Repair the door seal, as needed.
Is the repair complete?

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–

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System OK

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Check for control binding.
Does the control bind?

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–

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Go to Step 13

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Go to Step 12

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1. Reinstall the cable to the door.
2. Check the cable-to-dash components clearances.
3. Repair any interference.
Is the repair complete?

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System OK

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1. Remove the cable from the control.
2. Check the control for binding.
Does the control bind?

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–

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Go to Step 14

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Go to Step 15

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Replace the control.
Is the repair complete?

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System OK

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Replace the cable.
Is the repair complete?

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–

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System OK

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–

7A – 16 HEATING AND VENTILATION SYSTEM

BLOWER NOISE

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Step

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Action

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Value(s)

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Yes

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Verify the customer’s complaint.
Are the customer’s concerns verified?

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–

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Go to Step 2

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System OK

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1. Sit inside the vehicle.
2. Close the doors and windows.
3. Turn the ignition ON.
4. Set the blower speed to 4.
5. Set the temperature to full cold.
6. Cycle through the blower speeds, the modes, and

the temperature settings in order to find the noise.

Is the blower noise constant at high blower speeds
or certain modes, but absent at lower speeds or in
other modes?

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Go to Step 11

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Go to Step 3

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Check for vibrations from the blower motor and fan
assembly at each blower speed by feeling the
blower motor housing.
Did you find excessive vibration?

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Go to Step 6

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Go to Step 4

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1. Remove the blower motor and fan assembly.

Refer to ‘‘Blower Motor” in this section.

2. Check for foreign material at the opening of the

blower inlet.

Did you find any foreign material at the blower inlet?

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Go to Step 5

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Go to Step 6

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Remove all foreign material.
Is the repair complete?

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System OK

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Go to Step 6

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1. Examine the blower fan for wear spots, cracked

blades, a cracked hub, a loose fan retaining nut,
or bad alignment.

2. Examine the blower case for wear spots.
Did you find any problem?

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Go to Step 7

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Go to Step 9

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Lubricate the motor.
Is the repair complete?

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System OK

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Go to Step 8

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Replace the motor and fan assembly.
Is the repair complete?

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System OK

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Go to Step 9

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If the noise is a click/tick or whine, replace the mo-
tor.
Is the repair complete?

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–

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System OK

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Go to Step 10

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Reinstall the original motor.
Is the problem still present?

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–

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Go to Step 11

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System OK

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1. Set the blower speed on 4.
2. Check full-hot to full-cold temperature positions in

the defrost, floor, and vent modes.

Is the noise present in the defrost mode only?

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Go to Step 12

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Go to Step 13

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1. Check the ducts for obstructions or foreign

materials.

2. Remove any obstructions or foreign materials.
3. Check floor/defroster door seals.
4. Repair or replace, as needed.
Is the repair complete?

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System OK

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Is the noise present in the floor mode only?

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Go to Step 12

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Go to Step 14

HEATING AND VENTILATION SYSTEM 7A – 17

Blower Noise (Cont’d)

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Step

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Action

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Value(s)

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Yes

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Is the noise present in the vent mode only?

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–

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Go to Step 15

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Go to Step 16

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1. Check the ducts for obstructions or foreign

materials.

2. Remove any obstructions or foreign materials.
3. Check the vent door seals.
4. Repair or replace as needed.
Is the repair complete?

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–

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System OK

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–

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Is the noise present in all modes, but not all temper-
ature positions?

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–

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Go to Step 17

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Go to Step 18

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1. Check the temperature door seals.
2. Repair or replace, as needed.
Is the repair complete?

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–

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System OK

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–

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Check the system for obstructions or foreign

materials between the fan and the temperature
door.

2. Repair or replace, as needed.
Is the repair complete?

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–

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System OK

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Go to Step 2

Content .. 187 188 189 190 ..