Download SERVICE INFORMATION If a 2002 Altima, with manual (non-automatic) A/C, exhibits the following symptoms: • • • • No heat from vents Always discharges cold air A/C does not cool Temperature cannot be adjusted, Check to see if the air mix gear door drive gear fell off. (See Figure 1). If the gear is missing, find it (hopefully it’s still on the floor). Then re-install it using the Service Procedure on Page 2. SERVICE PROCEDURE 1. Remove the following components; • • • cluster lid “C” (HVAC control surround trim) fuse box cover driver’s side instrument panel lower cover (attached with 2 screws). 2. Remove the screw from the center of the cable operated gear (see Figure 2). 3. Locate the small (about 1” dia.) white air mix door gear. Hopefully it is still on the floor. NOTE: If you cannot find the old air mix door gear, order a new gear. Refer to the Parts Information section of this bulletin. 4. To see how it is supposed to fit, temporarily install the gear into the air mix door shaft (see Figure 3). 5. Remove the gear, thoroughly clean the gear shaft of any grease, and apply the glue. See Figure 4.