Step

Action

Yes

No

Were you sent here from the HVAC Symptoms?

Go to Step 2

Go to Symptoms - HVAC Systems - Manual or Symptoms - HVAC Systems - Automatic

1. Start the engine.
2. Cycle through all of the following:

•	Blower motor speeds

•	HVAC Modes

•	Temperature control settings

3. Attempt to define the type of noise:

•	Scrape, pop

•	Tick/click, chirp or groaning

•	Air rush/whistle

Is a scrape or pop noise evident when selecting modes or temperature settings?

Go to Step 6

Go to Step 3

Is a tick/click, chirping, groaning or scraping noise present, but decreases as blower motor speed is decreased?

Go to Step 6

Go to Step 4

Is an air rush/whistle noise evident in all modes but not all temperature settings?

Go to Step 6

Go to Step 5

Is an air rush/whistle noise evident only in defrost or floor mode?

Go to Step 6

Go to Step 7

Remove the IP trim pad. Refer to Instrument Panel Upper Trim Pad Replacement in Instrument Panel, Gages and Console.

Is the action complete?

Go to Step 7

--

1. Inspect the air flow doors for proper operation.
2. Inspect the condition of the air flow doors.
3. Inspect the ducts for obstructions or foreign materials.
4. Inspect the temperature door seals.

Were any of these conditions found?

Go to Step 13

Go to Step 8

Inspect the mode and temperature doors for warping or cracking.

Are the doors in normal condition?

Go to Step 9

Go to Step 11

Inspect the HVAC ducts for any obstructions or foreign material.

Were any obstructions found?

Go to Step 13

Go to Step 10

Inspect the temperature doors seals.

Are the door seals in good condition?

Go to Step 14

Go to Step 11

Replace the appropriate door seals.

Is the repair complete?

Go to Step 14

--

Replace the appropriate door.

Is the repair complete?

Go to Step 14

--

Remove any obstructions or foreign material found.

Is the action complete?

Go to Step 14

--

Install the IP trim pad. Refer to Instrument Panel Upper Trim Pad Replacement in Instrument Panel, Gages and Console.

Is the action complete?

Go to Step 15

--

Operate the system to verify the repair.

Does the system operate correctly?

System OK

Go to Step 2