A/C - Blower Makes An Unusual Noise

SI B64 04 12
Heating and Air Conditioning

October 2012
Technical Service

SUBJECT
Blower Makes an Unusual Noise

MODEL
F30

SITUATION
An unusual howling noise is heard coming from the glove compartment and passenger foot well area (blower motor).

CAUSE
Foreign material such as leaves may have entered the blower motor via the fresh air intake.

PROCEDURE

1. Using ISTA, perform a vehicle test and complete all test plans for related stored fault codes.

Note:
When the ISTA system message displays: "Battery voltage only "XX.XX" V. Please connect charger". Note the displayed battery voltage reading in the repair order comments section.

2. If there are no fault codes stored and/or step 1 above does not resolve the issue, proceed with the steps below.

3. Perform and follow the recommendations in test plan AT6450_20GEBL - Blower output stage and blower motor. This test plan can be found as follows: Activities / Information search / Function Structure / Body / Heating and air conditioning functions / Blower / Start search.

4. If no debris or foreign material is found, repair the vehicle as per the test plan recommendations. Do not perform the steps listed below, as this SI no longer applies.

5. The steps listed below should only be performed if debris or foreign material is found in the blower motor.

6. Remove the cover (1) by loosening the three fasteners circled in red.





7. Remove the side panel trim piece (2) by removing the 3 expanding rivets circled in yellow.





8. The windshield cowl panel (3) must be loosened to better access the fresh air intake cover. Release the five fasteners circled in red.

9. Remove the expanding rivet shown by the arrow.





10. The fresh air intake cover (4) must be removed. Disconnect the sensor shown by the arrow and remove the two fasteners circled.





11. Place the fresh air intake cover on the work bench.

12. Using a utility knife, cut the foam material "2" to approximately the same height as section "1."





13. Install the air intake screen over the fresh air inlet, as shown. Make sure the screen is as shown on the inside of the "tabs" identified by the arrows.

14. Refer to the Parts section of this SI for the part number of the screen.





15. After installing the screen, verify the screen is installed as shown in this picture and the previous one. It must be in its original shape prior to installation. If it is deformed or kinked, it is not installed correctly.

16. Reinstall the fresh air intake cover; reconnect the sensor and the other parts removed or loosened.





PARTS INFORMATION








WARRANTY INFORMATION