A/C Suction Line - Moan/Whine Noise: Overview
NO: 24-13-95GROUP: Heater & A/C
DATE: Sep. 29, 1995
SUBJECT:
A/C Related
Moan/Whine Noise
MODELS:
1996 (NS) Town & Country/Caravan/Voyager
NOTE:
THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO JUNE 28, 1995 (MDH 062895). THIS REPAIR MAY NOT TOTALLY ELIMINATE THE MOAN/WHINE NOISE, BUT WILL SIGNIFICANTLY REDUCE IT.
SYMPTOM/CONDITION:
A very limited number of NS vehicles built prior to June 28, 1995 may exhibit a moan/whine noise in the 1400 to 2000 engine rpm range when the A/C compressor is operating. The noise is the result of resonance of components of the vehicle which is transmitted into the passenger compartment through the A/C suction line. Although the noise is audible when the A/C compressor is operating, the noise is NOT directly related to the compressor itself. Changing the A/C compressor will not change the noise condition.
NOTE:
THIS A/C RELATED MOAN/WHINE NOISE CAN BE MISTAKEN AS A TRANSAXLE RELATED NOISE AND RESULT IN UNNECESSARY REPAIR ATTEMPTS IF THE DIAGNOSTIC PROCEDURE IS NOT FOLLOWED.
DIAGNOSIS:
Operate the engine in the 1200 to 1800 rpm range and press the A/C button to engage the A/C compressor. If an objectionable moan/whine is heard, press the A/C button to disengage the A/C compressor, if the noise is reduced with the A/C compressor disengaged, perform the Repair Procedure.
PARTS REQUIRED:
AR 4677164 (change letter "R" or later) Line, A/C Suction Without Rear A/C
AR 4677167 (change letter "T" or later) Line, A/C Suction With Rear A/C
1 4856770 0-ring, Liquid Line
NOTE:
THE PART NUMBER AND CHANGE LETTER ARE STAMPED ON THE CRIMP AT THE COMPRESSOR END OF THE A/C SUCTION LINE.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 24-45-20-92 Without Rear Heater & A/C 1.2 Hrs.
24-45-26-90 With Rear Heater & A/C 2.0 Hrs.
FAILURE CODE: P8 - New Part