A/C - Reduced Performance

91oldsmobile05

NUMBER: 91-T-210

CORP.REF.NO: 131213

DATE: November 1991

SECTION: 1B


SUBJECT: REDUCED A/C PERFORMANCE
- PERFORM DIAGNOSTICS/REPLACE LIQUID LINES

MODELS/YEARS: 1991 CUSTOM CRUISER


CONDITION: Some 1991 Custom Cruisers built between vehicle number MW304592 and MW307085 may exhibit reduced A/C performance. This condition will be indicated by a 10 degree temperature increase (higher than specified) at the center duct and a low side pressure that will not reach the 24 PSIG compressor cycle "off" point.

CAUSE: The liquid line may be oversized at the location of the orifice tube, allowing refrigerant to "bypass" the orifice tube.

CORRECTION: The technician should perform the "poor performance diagnostics" as outlined in the Service Manual. If the performance is not improved when following the guidelines, replace the liquid line.