For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Verify the customer complaint. Are the customer concerns verified? | Go to Step 2 | System OK
2 | Move controls other that the temperature adjustment. Is an excessive effort required to move the controls? | Go to Step 15 | Go to Step 3
3 | Move the temperature control. Is an excessive effort required to move the controls? | Go to Step 6 | Go to Step 4
4 | Move the temperature control. Does the temperature door move too easily? | Go to Step 5 | System OK
5 | Remove the cable from the controller. Does the knob turn freely, without the click stops? | Go to Step 15 | --
6 | Check the cables for improper routing, kinks, wiring interference, or other instrument panel interference. Is there a problem? | Go to Step 7 | Go to Step 8
7 | Repair as needed. Is the repair complete? | System OK | --
8 |

1. Remove the cable from the temperature door.
2. Cycle the door manually.
3. Check for door binding.

Is there any door binding?

Go to Step 9

Go to Step 12

9 | Check a binding door for shaft alignment, a bent shaft, or a warped case. Is the door seal OK? | Go to Step 10 | Go to Step 11
10 |

1. Check a binding door for a shaft alignment, a bent shaft, a bent door, or a warped case.
2. Repair as needed.

Is the repair complete?

System OK

--

11 | Repair the door seal, as needed. Is the repair complaint? | System OK | --
12 | Check for control binding. Does the control bind? | Go to Step 14 | Go to Step 13
13 |

1. Reinstall the cable to the door.
2. Check the clearance for the cable-to-dash components.
3. Repair any interference.

Is the repair complete?

System OK

--

14 |

1. Remove the cable from the control.
2. Check the control for binding.

Does the control bind?

Go to Step 15

Go to Step 16

15 | Replace the control. Is the repair complete? | System OK | --
16 | Replace the cable. Is the repair complete? | System OK | --