A/C - Slow to Warm Up or Inadequate Heat
89buick14Bulletin 89-1-17
Date Oct. '89
Ref. No. 89-239-1
Corp. Ref. No. 931106
SUBJECT: REDUCED HEATER SYSTEM PERFORMANCE (NEW HEATER OUTLET DUCT AND PROCEDURE)
MODELS AFFECTED: 1988-1989 REGALS
Comments about heater system performance, such as being slow to warm up or inadequate heat, may be received from some owners of 1988-1989 Regals.
If the heater system is operating properly and the engine temperature is in the operating range, the cause of the condition may be reduced air/heat distribution from the heater outlet.
This condition may now be addressed by using the following service parts and procedures.
PARTS
QUANTITY PART NUMBER PART NAME
1 52452131 Heater Outlet Duct
26 in. *06375 3M # 4508 Scotchfoam Black Vinyl Foam Tape
*Purchase Locally.
Parts are currently available from GMSPO.
Figure 1:
Figure 2:
Figure 3:
Figure 4:
PROCEDURE
^ Remove the R.H. hush panel, see Fig. 3.
^ Remove the ash tray retainer, Fig. 4, and disconnect the wiring harness from the retainer.
^ Remove the adapter duct, see Fig. 1.
^ Remove the heater outlet duct, see Fig. 1.
^ Remove the two top screws from the module, one on each side. These two screws will be used to mount the new heater outlet duct, see Fig. 2.
^ Install the 1/8 X 3/4 in. foam tape to the grooved mounting surface of the new heater outlet duct, approximately 11-3/4 in of tape across the top of the outlet duct and 7 in. of tape on each side. Trim off excess tape.
^ Install the new heater outlet duct to the module, see Fig. 2.
^ Install the adapter duct, see Fig. 1.
^ Using a bench grinder, make a 2 in. long by 3/8 in. deep cutout in the front edge of the ash tray retainer, as shown in Fig. 4.
^ Install the wiring to the retainer and install the ash tray retainer.
^ Cut off a two in. square piece of the R.H. hush panel as indicated in Fig. 3.
^ Install the R.H. hush panel.
^ Make sure the ash retainer does not interfere with the new heater outlet duct.
WARRANTY INFORMATION
Labor Operation: T1510
Labor Time: 0.6
Trouble Code: 92