Air Delivery Improper

WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

This procedure provides a test of all functions of the heater/defroster unit.

Warm up the vehicle.
Keep the engine running.
Perform the tests outlined in the table below and look for the results indicated.

Mode Knob	Temperature Control	Blower Motor Switch	Blower Speed	Power Vent Outlet	Floor Outlet	Defrost Outlet	Side Window Outlet
Vent	Cold	OFF	OFF	No Airflow	No Airflow	No Airflow	No Airflow
Vent	Cold	4	High	Ambient Airflow	No Airflow	No Airflow	No Airflow
Floor	Cold to Hot	4	High	No Airflow	Cold to Hot Airflow	Minimum Cold to Hot Airflow	Minimum Cold to Hot Airflow
Defroster	Cold to Hot	4	High	No Airflow	Minimum Cold to Hot Airflow	Cold to Hot Airflow	Minimum Cold to Hot Airflow

If any of these settings do not produce the correct results, perform the Improper Air Delivery diagnostic procedure.

Air Delivery Improper

Step	Action	Yes	No
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Examine the affected door in the unit for proper cable attachment. Inspect the cable connection to the door. Confirm that the cable sheath is properly retained. Is everything connected properly?	Go to Step 4	Go to Step 3
3	Repair, as necessary. Is the repair complete?	System OK	-
4	Disconnect the cable at the door. Inspect the range of the door travel and the effort required to move it. Does the door move freely through its entire range of travel so that it can close at both ends of the range?	Go to Step 5	Go to Step 3
5	Inspect the travel of the Bowden cable by turning the control knob. Is the actuator travel OK?	Go to Step 6	Go to Step 7
6	Reinstall the cable. Inspect the system using the Control Settings/Correct Results tests in this procedure. Does the system perform properly?	System OK	Go to Step 9
7	Inspect the cable attachment at the control. Inspect for a broken control. Is there a problem with the cable attachment or the control?	Go to Step 8	Go to Step 9
8	Repair the cable attachment or control as necessary. Is the repair complete?	System OK	Go to Step 9
9	Inspect the system using the Control Settings/Correct Results tests in this procedure. Is the repair complete?	System OK	Go to Step 10
10	Inspect for airflow from the defroster or the vent outlets. Is there high airflow from the defroster or the vent outlets?	Go to Step 11	Go to Step 12
11	Adjust the heater door at the floor and the vent door to get the proper airflow. Is the repair complete?	System OK	-
12	Switch the mode knob to defrost. Is the defroster airflow OK?	Go to Step 13	Go to Step 14
13	Remove the heater outlet. Inspect the heater outlet for obstructions. Remove any obstructions in the heater outlet. Is the repair complete?	System OK	-
14	Inspect the blower speeds for change in the airflow. Does the blower speed increase as the control is turned from 1 to 4?	Go to Step 15	Go to Blower Motor Malfunction
15	Inspect for obstructions in the system at the blower inlet. Remove any obstructions at the blower inlet. Is the repair complete?	System OK	Go to Step 16
16	Set the blower on 4. Rotate the temperature control from full hot to full cold. Listen for an airflow change. Did the airflow change?	Go to Step 17	Go to Step 18
17	Inspect the temperature door adjustment, the cables, the linkage, and the control. Adjust the temperature control to full hot. Is the repair complete?	System OK	-
18	Inspect the system for any obstruction between the blower and the system outlets. Remove any obstruction between the blower and the system outlets. Is the repair complete?	System OK	-