Rattle Popping Snapping Type Noise From Center IP Air Deflectors - keywords A/C air blower conditioning deflector duct heater high HVAC instrument panel vent whistle

This PI was superseded to update the areas of concern. Please discard PIT4485.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment about a rattle/popping/snapping type noise from the center IP air deflectors when the blower is on. In most cases, the noise is from the left center air deflector. This condition may be due to the air flow door being loose and vibrating. If the thumb wheel, to close off the air flow, is slightly rotated the noise will be eliminated or reduced.

To correct this concern, remove the center air outlet deflectors. With the airflow door in the full open position, to allow air flow, install a piece of black foam tape (obtained locally) along the top and bottom of the deflector housing so it just touches the air flow door. The foam tape should be positioned on the side of the air flow door so it does not obstruct the door from closing. With the foam tape properly installed, the air flow door will slightly contact the foam tape when in the full open position, preventing the door from vibrating.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.