A/C - Blower Noise, Fresh Air Cowl Modification

CLASSIFICATION: HA95-008a

REFERENCE: NTB95-043a

DATE: September 6, 1995

TRUCK/PATHFINDER BLOWER NOISE

This version of NTB95-043 amends the claim information in the Service Procedure. Please discard NTB95-043.

APPLIED VEHICLES:

1993-95 Truck (D21)
1993-95 Pathfinder (WD21)

APPLIED DATES:

Trucks built from January 1992 to May 11, 1995
Pathfinders built from July 1992 to December 26, 1994

SERVICE INFORMATION

If a rattling or rumbling noise is coming from the blower assembly, this may be caused by foreign material such as tree leaves entering the heating and air conditioning system ducts through the fresh air cowl intake.

SERVICE PROCEDURE

1. Test the blower for the noise incident with the customer present.




2. If the incident is confirmed, inspect the right and left cowl top grilles and compare to Figure 1.

3. If the grilles are the old design:




A. Remove and discard both the right and left cowl top grilles (see Figure 2).

B. Clean the cowl box and install new cowl top grilles specified in this bulletin.

C. Remove the blower motor and clean all debris from blower motor, motor cooling tube, blower wheel and inlet duct. Re-install blower motor.

D. Submit a warranty claim for the grille parts, labor for installation, plus the labor to R&R the blower.




Parts/Claim Information