Skylark L4-138 2.3L SOHC VIN 3 MFI QUAD 4 (1992)
Housing Assembly HVAC: Customer Interest
A/C - Insufficient Cooling
Group Ref.: HVAC
Bulletin No.: 231204
Date: November, 1993
SUBJECT:
INSUFFICIENT A/C COOLING, TEMPERATURE DOOR NOT CLOSING IN FULL COLD (REPLACE TEMPERATURE DOOR CONTROL
ARM)
MODELS:
1992 BUICK SKYLARK
1992 OLDSMOBILE ACHIEVA
1992 PONTIAC GRAND AM
This bulletin is being revised to provide updated parts information and change the service procedure. Previous divisional publication numbers were:
Buick
92-1-15
GM of Canada
92-1-121
Oldsmobile
92-T-116
Pontiac
92-1-9
Important:
Prior to performing any service procedure related to air conditioning low performance conditions, this procedure MUST be completed first.
CONDITION:
Some owners may comment on insufficient air conditioning cooling, when pressures are within specifications (refer to "V-5 TXV Diagnostic Test",
SECTION 1B in applicable Service Manual).
CAUSE:
Heater - A/C temperature door may not be closing completely, allowing "warmed" air to blend with "cooled" A/C discharge air.
CORRECTION:
For repair, perform the following:
1.
Remove right side lower I/P insulator to gain access to lower temperature control cable.
2.
Remove temperature control cable from temperature door arm (use 7 mm socket to push the retaining "fingers" together to allow easier removal)
and unscrew end from cable.
3.
Remove temperature door arm retainer (gold colored) from case post. Remove arm and discard both arm and retainer.