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10C-56
No Hot Air From Blower
Step
Check the coolant level.
1
Is the coolant level within the specified value?
Add coolant as needed.
2
Is the repair complete?
1. Turn the ignition to ON.
2. Observe the temperature indication screen of the controller.
3
Does the digit flash?
Observe the blower motor operation.
4
Is the blower motor functioning at all?
Use the blower push switch to cycle the blower through its different
speeds.
5
Does the motor function at different speeds?
Run a self diagnosis circuit check.
Does the display indicate a defect code?
6
Check the airflow of the ducts at each mode.
7
Is the airflow normal?
Check inside the heater duct for obstructions and repair as needed.
8
Is the repair complete?
Observe the air mix door motor while changing the temperature setting
from LO to HI and then from HI to LO.
9
Is the air mix door actuator functioning properly?
Check the coolant hoses for leaks or kinks.
10
Are the coolant hoses in good condition?
Replace the coolant hoses.
11
Is the repair complete?
Check the coolant reservoir cap.
12
Is the coolant tank cap in hood condition?
Replace the coolant reservoir cap.
13
Is the repair complete?
1. Turn the A/C switch to ON.
2. Set the temperature control to full hot (HI).
3. Set the blower motor speed to full high.
14
4. Remove the coolant reservoir cap (all segments illuminated on the
display).
5. Start the vehicle and run the engine at idles.
6. Watch for the flow of the coolant when the thermostat opens.
Does the coolant flow normally?
1. Check for
•
faulty thermostat.
•
failed coolant pump impeller.
15
•
restriction in the cooling system.
2. Make repairs, as needed.
Is the repair complete?
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
Action
Yes
No
Go to Step 3
Go to Step 2
System OK
-
Go to Step 6
Go to Step 4
Go to "Blower
Motor Does Not
Go to Step 5
Run At All"
Go to "the
Applicable
Diagnostic
Go to Step 7
Table"
Go to "the
Applicable
Diagnostic
Go to Step 7
Table"
Go to Step 9
Go to Step 8
System OK
-
Go to "the
Applicable
Diagnostic
Go to Step 10
Table"
Go to Step 12
Go to Step 11
System OK
-
Go to Step 14
Go to Step 13
System OK
-
Go to Step 16
Go to Step 15
System OK
-
A/C SYSTEM
REXTON SM - 2004.4
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