Daewoo Nubira Owner's Manual page 426

Step
13
1. Check for the following problems:
S Restriction in the cooling system.
S Failed water pump impeller.
S Faulty thermostat.
2. Make repairs to the cooling system, as needed.
Are the repairs complete?
14
1. Install the surge tank cap.
2. With the ignition ON, allow the engine to warm
up for approximately 20 minutes. Drive the ve-
hicle at 48 km/h (30 mph).
3. Use a thermometer to measure the ambient air
temperature and the discharge air temperature
at the heater outlet.
Does the heater output meet the minimum values
specified?
15
1. Check the vehicle for cold air leaks at the fol-
lowing locations:
S Dash.
S Heater cases.
S Vents.
2. Check under the seat for obstructions.
3. Repair any leaks or obstructions.
Are the repairs complete?
16
1. Turn the ignition OFF.
2. Turn the temperature control knob from full
cold to full hot.
3. Listen for the sound of the temperature door
slam just before reaching the end of the travel
range of the control knob.
Does the door slam?
17
1. Check the following aspects of the temperature
door:
S Travel.
S Cables.
S Linkage.
2. Verify the accuracy of the temperature controls
at full hot.
3. Verify the accuracy of the temperature controls
at full cold.
Is the repair complete?
18
1. Turn the temperature control knob to full hot.
2. Start the vehicle.
3. Check the temperature of the heater inlet hose
and the heater outlet hose by feel. The air tem-
perature around the hoses should be at least
29°C (84°F).
Is the heater inlet hose hot and the heater outlet
hose warm?
19 Check the thermostat. Refer to 1D, Engine Cooling.
Is the thermostat installed and seated properly?
DAEWOO V–121 BL4
Action
HEATING AND VENTILATION SYSTEM 7A – 5
Value(s)
Refer to "Heat-
er Temperature
Specifications"
Yes No
System OK Go to Step 14
Go to Step 15 Go to Step 16
System OK
Go to Step 18 Go to Step 17
System OK
Go to Step 19 Go to Step 22
Go to Step 20 Go to Step 21