Blower Noise - Daewoo Nubira Owner's Manual

7A – 14IHEATING AND VENTILATION SYSTEM
Step
1 Verify the customer's complaint.
Are the customer's concerns verified?
2
1. Sit inside the vehicle.
2. Close the doors and the windows.
3. Turn the ignition ON.
4. Start the engine.
5. Turn the temperature control knob 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?
3 Check for vibrations from the blower motor and fan
assembly at each blower speed by feeling the blower
motor housing.
Is there excessive vibration?
4
1. Remove the blower motor and the fan assem-
bly. Refer to "Blower Motor" in this section.
2. Check for foreign material at the opening of the
blower inlet.
Is there any foreign material at the blower inlet?
5 Remove all foreign material.
Is the repair complete?
6
1. Examine the blower fan for wear spots,
cracked blades, a cracked hub, a loose fan re-
taining nut, or bad alignment.
2. Examine the blower case for wear spots.
Are there any problems?
7 Repair, as required.
Is the repair complete?
8 Replace the motor and the fan assembly.
Is the repair complete?
9 If the noise is a click, tick or whine, replace the motor.
Is the repair complete?
10 Reinstall the original motor.
Is the problem still present?
11
1. Turn the blower motor switch to 4.
2. Check full hot to full cold temperature positions
in the defrost, the floor, and the vent modes.
Is the noise present in the defrost mode only?
12
1. Check the ducts for obstructions or foreign ma-
terials.
2. Remove any obstructions or foreign materials.
3. Check the floor/defroster door seals.
4. Repair or replace, as needed.
Is the repair complete?
13 Is the noise present in the floor mode only?
14 Is the noise present in the vent mode only?

BLOWER NOISE

Action Value(s) Yes
Go to Step 2
Go to Step 11
Go to Step 6
Go to Step 5
System OK
Go to Step 7
System OK
System OK
System OK
Go to Step 11
Go to Step 12
System OK
Go to Step 12
Go to Step 15
No
System OK
Go to Step 3
Go to Step 4
Go to Step 6
Go to Step 6
Go to Step 9
Go to Step 8
Go to Step 9
Go to Step 10
System OK
Go to Step 13
Go to Step 14
Go to Step 16
DAEWOO V–121 BL4