Was the Function Test performed?

Go to Step 2

Go to Function Test

Inspect the control cables from the heater control unit to the heater case and the blower case. Inspect for improper routing, kinks, and interference.

Do any of the control cables have improper routing, kinks or interference?

Go to Step 6

Go to Step 3

1. Disconnect the control cable from the door that causes the binding.
2. Cycle the door manually.

Does the door bind?

Go to Step 5

Go to Step 4

1. Inspect for control binding.
2. Remove the heater control unit. Refer to Control Assembly Replacement .
3. Disconnect the control cable from the heater control unit in order to determine if the cable or the control unit is binding.

Does control binding exist?

Go to Step 7

Go to Step 8

1. Remove the heater case. Refer to Heater Case Replacement .
2. Inspect the door seal for proper installation.
3. Inspect for a bent door shaft.
4. Inspect for a warped heater case.
5. Replace the door seal or replace the heater case.

Is the repair complete?

Go to Function Test

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1. Route the control cables in order to avoid interference. Ensure that the cables have the proper clearance to the instrument panel components.
2. Replace any control cables that are kinked. Refer to the following:

•	Temperature Control Cable Replacement

•	Vent Control Cables Replacement

•	Mode Control Cable Replacement

Is the repair complete?

Go to Function Test

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Replace the heater control unit. Refer to Control Assembly Replacement .

Is the repair complete?

Go to Function Test

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Replace the corresponding control cable. Refer to the following:

Is the repair complete?

Go to Function Test

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